Program Expansion - FSP Participation Milestones in the 1960s and Early 1970s.

In April 1965, participation topped half a million. (Actual participation was 561,261 people.) Participation topped 1 million in March 1966, 2 million in October 1967, 3 million in February 1969, 4 million in February 1970, 5 million one month later in March 1970, 6 million two months later in May 1970, 10 million in February 1971, and 15 million in October 1974. Rapid increases in participation during this period were primarily due to geographic expansion.