Multi-axis average in Views?

How can I manage it to get an average of a multiaxis voting per node?

I have tried the views custom field module to calculate the data but it does not get data...
Here is the output of print var_export($data, TRUE);
(this shows all accessible data)

stdClass::__set_state(array( 'nid' => '41', 'node_type' => 'page', 'node_language' => 'de', 'node_title' => 'Testseite 3', 'votingapi_cache_users_percent_testvote_average_value' => NULL, 'votingapi_cache_users_percent_testvote2_sum_value' => NULL, 'votingapi_vote_users_percent_testvote_curuser_value' => NULL, 'votingapi_vote_users_percent_testvote2_curuser_value' => NULL, ))

(testvote and testvote2 are the rate widgets)

I have no idea how to continue...