Unlike the WPA, it did not hire the unemployed directly. More than any other New Deal program, the PWA epitomized the progressive notion of "priming the pump" to encourage economic recovery. Between July 1933 and March 1939, the PWA funded and administered the construction of more than 34,000 projects including airports, large electricity-generating dams, major warships for the Navy, and bridges and 70% of the new schools and one-third of the hospitals built-in 1933–1939.