Total Members (1950):
2,071,649
Total Members (1951):
2,178,690
Total Members (1952):
2,350,597
Total Members (1953):
2,498,793
Total Members (1954):
2,797,255
Total Members (1955):
3,064,743
Total Members (1956):
3,280,402
Total Members (1957):
3,460,971
Total Members (1958):
3,615,073
Total Members (1959):
3,686,763
