Employers in the United States over a certain size (I think it's 50 employees, but i could be wrong) are required to report demographics of their applicants to

Employers in the United States over a certain size (I think it's 50 employees, but i could be wrong) are required to report demographics of their applicants to the Federal Government. The responses must be voluntary and they cannot be tied to any specific applicant (so, they can't see that applicant A listed themselves as White and applicant B listed themselves as African-American).