diff --git a/DependencyInjection/ChillActivityExtension.php b/DependencyInjection/ChillActivityExtension.php
index 262925889..72dc28583 100644
--- a/DependencyInjection/ChillActivityExtension.php
+++ b/DependencyInjection/ChillActivityExtension.php
@@ -27,6 +27,8 @@ use Symfony\Component\Config\FileLocator;
 use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 use Symfony\Component\DependencyInjection\Loader;
 use Symfony\Component\DependencyInjection\Extension\PrependExtensionInterface;
+use Chill\ActivityBundle\Security\Authorization\ActivityStatsVoter;
+use Chill\ActivityBundle\Security\Authorization\ActivityVoter;
 
 /**
  * This is the class that loads and manages your bundle configuration
@@ -72,8 +74,9 @@ class ChillActivityExtension extends Extension implements PrependExtensionInterf
     {
         $container->prependExtensionConfig('security', array(
            'role_hierarchy' => array(
-              'CHILL_ACTIVITY_UPDATE' => array('CHILL_ACTIVITY_SEE'),
-              'CHILL_ACTIVITY_CREATE' => array('CHILL_ACTIVITY_SEE')
+              ActivityVoter::UPDATE => array(ActivityVoter::SEE),
+              ActivityVoter::CREATE => array(ActivityVoter::SEE),
+              ActivityVoter::SEE    => array(ActivityStatsVoter::STATS)
            )
         ));
     }
diff --git a/Export/Aggregator/ReasonAggregator.php b/Export/Aggregator/ReasonAggregator.php
index 7a97cad47..5698d4071 100644
--- a/Export/Aggregator/ReasonAggregator.php
+++ b/Export/Aggregator/ReasonAggregator.php
@@ -23,6 +23,7 @@ use Symfony\Component\Form\FormBuilderInterface;
 use Doctrine\ORM\QueryBuilder;
 use Chill\MainBundle\Export\AggregatorInterface;
 use Symfony\Component\Security\Core\Role\Role;
+use Chill\ActivityBundle\Security\Authorization\ActivityVoter;
 
 /**
  * 
@@ -86,9 +87,28 @@ class ReasonAggregator implements AggregatorInterface
         return "Aggregate by activity reason";
     }
     
-    public function requiredRole()
+    public function addRole()
     {
-        return new Role('dummy');
+        return new Role(ActivityVoter::SEE);
+    }
+
+    public function getLabels($key, array $values, $data)
+    {
+        return array_combine($values, $values);
+        
+    }
+
+    public function getQueryKeys($data)
+    {
+        // add select element
+        if ($data['level'] === 'reason') {
+            return array('activity_reason_id');
+        } elseif ($data['level'] === 'category') {
+            return array ('activity_category_id');
+        } else {
+            throw new \RuntimeException('the data provided are not recognised');
+        }
+        
     }
 
 }
diff --git a/Export/Export/CountActivity.php b/Export/Export/CountActivity.php
index abfd8f89f..11f7aebf5 100644
--- a/Export/Export/CountActivity.php
+++ b/Export/Export/CountActivity.php
@@ -20,9 +20,10 @@
 namespace Chill\ActivityBundle\Export\Export;
 
 use Chill\MainBundle\Export\ExportInterface;
-use Doctrine\ORM\Query\Expr\Join;
 use Doctrine\ORM\QueryBuilder;
 use Symfony\Component\Security\Core\Role\Role;
+use Doctrine\ORM\Query;
+use Chill\ActivityBundle\Security\Authorization\ActivityStatsVoter;
 
 /**
  * 
@@ -77,7 +78,34 @@ class CountActivity implements ExportInterface
     
     public function requiredRole()
     {
-        return new Role('dummy');
+        return new Role(ActivityStatsVoter::STATS);
+    }
+
+    public function getAllowedFormattersTypes()
+    {
+        return array(\Chill\MainBundle\Export\FormatterInterface::TYPE_TABULAR);
+    }
+
+    public function getLabels($key, array $values, $data)
+    {
+        if ($key !== 'export_count_activity') {
+            throw new \LogicException("the key $key is not used by this export");
+        }
+        
+        $labels = array_combine($values, $values);
+        $labels['_header'] = 'Number of activities';
+        
+        return $labels;
+    }
+
+    public function getQueryKeys($data)
+    {
+        return array('export_count_activity');
+    }
+
+    public function getResult(QueryBuilder $qb, $data)
+    {
+        return $qb->getQuery()->getResult(Query::HYDRATE_SCALAR);
     }
 
 }
diff --git a/Export/Filter/ActivityReasonFilter.php b/Export/Filter/ActivityReasonFilter.php
index 6b0107200..9f2059fbe 100644
--- a/Export/Filter/ActivityReasonFilter.php
+++ b/Export/Filter/ActivityReasonFilter.php
@@ -27,6 +27,7 @@ use Chill\ActivityBundle\Entity\ActivityReason;
 use Chill\MainBundle\Templating\TranslatableStringHelper;
 use Doctrine\ORM\Query\Expr;
 use Symfony\Component\Security\Core\Role\Role;
+use Chill\ActivityBundle\Security\Authorization\ActivityVoter;
 
 /**
  * 
@@ -90,8 +91,8 @@ class ActivityReasonFilter implements FilterInterface
         return 'Filter by reason';
     }
     
-    public function requiredRole()
+    public function addRole()
     {
-        return new Role('dummy');
+        return new Role(ActivityVoter::SEE);
     }
 }
diff --git a/Resources/config/services.yml b/Resources/config/services.yml
index 090ff55ac..37383ab2e 100644
--- a/Resources/config/services.yml
+++ b/Resources/config/services.yml
@@ -38,6 +38,14 @@ services:
             - { name: security.voter }
             - { name: chill.role }
             
+    chill.activity.security.authorization.activity_stats_voter:
+        class: Chill\ActivityBundle\Security\Authorization\ActivityStatsVoter
+        arguments:
+            - "@chill.main.security.authorization.helper"
+        tags:
+            - { name: security.voter }
+            - { name: chill.role }
+            
             
     chill.activity.timeline:
         class: Chill\ActivityBundle\Timeline\TimelineActivityProvider
diff --git a/Security/Authorization/ActivityStatsVoter.php b/Security/Authorization/ActivityStatsVoter.php
new file mode 100644
index 000000000..94eedf1fb
--- /dev/null
+++ b/Security/Authorization/ActivityStatsVoter.php
@@ -0,0 +1,76 @@
+<?php
+
+/*
+ * Copyright (C) 2016 Champs-Libres <info@champs-libres.coop>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace Chill\ActivityBundle\Security\Authorization;
+
+use Chill\MainBundle\Security\Authorization\AbstractChillVoter;
+use Chill\MainBundle\Security\Authorization\AuthorizationHelper;
+use Chill\MainBundle\Security\ProvideRoleInterface;
+use Chill\ActivityBundle\Security\Authorization\ActivityVoter;
+
+/**
+ * 
+ *
+ * @author Julien Fastré <julien.fastre@champs-libres.coop>
+ */
+class ActivityStatsVoter extends AbstractChillVoter implements ProvideRoleInterface
+{
+    const STATS = 'CHILL_ACTIVITY_STATS';
+    
+    /**
+     *
+     * @var AuthorizationHelper
+     */
+    protected $helper;
+    
+    public function __construct(AuthorizationHelper $helper)
+    {
+        $this->helper = $helper;
+    }
+
+    protected function getSupportedAttributes()
+    {
+        return array(self::STATS, ActivityVoter::SEE);
+    }
+
+    protected function getSupportedClasses()
+    {
+        return array('Chill\MainBundle\Entity\Center');
+    }
+
+    protected function isGranted($attribute, $object, $user = null)
+    {
+        if (!$user instanceof \Symfony\Component\Security\Core\User\UserInterface) {
+            return false;
+        }
+        
+        return $this->helper->userHasAccess($user, $object, $attribute);
+    }
+
+    public function getRoles()
+    {
+        $this->getSupportedAttributes();
+    }
+
+    public function getRolesWithoutScope()
+    {
+        $this->getSupportedAttributes();
+    }
+
+}