A 2012 national telephone survey of a sample of 400 Iranian-Americans, commissioned by the Public Affairs Alliance of Iranian Americans and conducted by Zogby Research Services, asked the respondents what their religions were. The responses broke down as follows: Muslim 31%, atheist/realist/humanist 11%, agnostic 8%, Baháʼí 7%, Jewish 5%, Protestant 5%, Roman Catholic 2%, Zoroastrian 2%, "Other" 15%, and "No response" 15%. The survey had a cooperation rate of 31.2%. The margin of error for the results was +/- 5 percentage points, with higher margins of error for sub-groups. Notably, the number of Muslims decreased from 42% in 2008 to 31% in 2012.