In the United States, job openings refer to all positions that are open (not filled) on the last business day of the month. Job openings are part of the Job Openings and Labor Turnover Survey (JOLTS). The survey collects data from around 16400 nonfarm establishments including retailers and manufacturers, as well as federal, state, and local government entities in the 50 states and the District of Columbia. The JOLTS assesses the unmet demand for labor in the U.S. labor market and gained attention in 2014 as favorite labor market indicator of Federal Reserve Chair Janet Yellen.