The Fair Labor Standards Act (FLSA), enacted in 1938, is the federal legislation that establishes the minimum hourly wage that must be paid to all covered workers. The minimum wage provisions of the FLSA have been amended numerous times since 1938, typically for the purpose of expanding coverage or raising the wage rate. Since its establishment, the minimum wage rate has been raised 22 separate times. The most recent change was enacted in 2007 (P.L. 110-28), which increased the minimum wage to its current level of $7.25 per hour. In addition to setting the federal minimum wage rate, the FLSA provides for several exemptions and subminimum wage categories for certain classes of workers and types of work. Even with these exemptions, the FLSA minimum wage provisions still cover the vast majority of the workforce. Despite this broad coverage, however, the minimum wage directly affects a relatively small portion of the workforce. Currently, there are approximately 3.3 million workers, or 4.3% of all hourly paid workers, whose wages are at or below the federal minimum wage of $7.25 per hour. Approximately three-quarters of minimum wage workers are age 20 or older and nearly two-thirds work part time. Proponents of increasing the federal minimum wage argue that it may increase earnings for lower income workers, lead to reduced turnover, and increase aggregate demand by providing greater purchasing power for workers receiving a pay increase. Opponents of increasing the federal minimum wage argue that it may result in reduced employment or reduced hours, lead to a general price increase, and reduce profits of firms paying a higher minimum wage.