2014 is the most recent year for which data is available from the IMLS. The 2015 data is likely to be available this summer.
Source: Public Libraries Surveys (Institute of Museum and Library Services)
NEW SERIES: Number of Paid Full-Time-Equivalent (FTE) Staff in U.S. Public Libraries (U.S., Alabama-California). (12/6/2014)
Oklahoma-South Carolina. (12/20/2014)
South Dakota-Vermont. (12 /26/2014)