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| Membership History |
| Year | Admitted | Initiated | Suspended | Resigned | Deceased | Net Increase | December 27th |
| 1948 | 891 | 11,215 | 479 | 371 | 4,060 | 7,196 | 217,581 |
| 1949 | 1,417 | 10,566 | 458 | 878 | 4,032 | 6,615 | 224,196 |
| 1950 | 719 | 9,882 | 569 | 347 | 4,219 | 5,466 | 229,662 |
| 1951 | 718 | 9,743 | 611 | 345 | 4,340 | 5,164 | 234,827 |
| 1952 | 648 | 9,916 | 649 | 335 | 4,575 | 5,005 | 239,832 |
| 1953 | 635 | 9,904 | 646 | 370 | 4,651 | 4,872 | 244,704 |
| 1954 | 977 | 9,171 | 626 | 749 | 4,645 | 4,128 | 248,832 |
| 1955 | 575 | 8,975 | 746 | 416 | 4,814 | 3,574 | 252,406 |
| 1956 | 716 | 8,720 | 919 | 734 | 4,937 | 2,846 | 255,252 |
| 1957 | 690 | 7,915 | 1,026 | 574 | 5,252 | 1,753 | 257,005 |
| 1958 | 615 | 6,746 | 1,275 | 611 | 5,217 | 258 | 257,263 |
| 1959 | 833 | 6,554 | 1,196 | 483 | 5,260 | 448 | 257,711 |
| 1960 | 613 | 6,852 | 1,018 | 643 | 5,600 | 204 | 257,915 |
| 1961 | 1,094 | 5,961 | 1,269 | 980 | 5,374 | *568 | 257,347 |
| 1962 | 636 | 5,864 | 1,392 | 638 | 5,684 | *1,214 | 256,133 |
| 1963 | 823 | 5,666 | 1,378 | 681 | 5,950 | *1,520 | 254,613 |
| 1964 | 931 | 5,805 | 1,238 | 810 | 5,627 | *939 | 253,674 |
| 1965 | 885 | 5,930 | 1,115 | 855 | 5,855 | *1,010 | 252,664 |
| 1966 | 617 | 5,730 | 1,229 | 602 | 6,050 | *1,534 | 251,130 |
| 1967 | 719 | 5,455 | 1,239 | 698 | 5,997 | * 1,760 | 249,370 |
| 1968 | 833 | 5,316 | 1,236 | 767 | 6,203 | *2,057 | 247,313 |
| 1969 | 648 | 5,041 | 1,268 | 591 | 6,123 | *2,293 | 245,020 |
| 1970 | 610 | 4,734 | 1,305 | 635 | 6,034 | *2,630 | 242,390 |
| 1971 | 828 | 4,689 | 1,468 | 741 | 6,018 | *2,710 | 239,682 |
| 1972 | 1,515 | 4,733 | 1,392 | 684 | 6,128 | *2,843 | 236,832 |
| 1973 | 739 | 5,003 | 1,138 | 639 | 6,199 | *2,234 | 234,598 |
| 1974 | 694 | 4,860 | 1,389 | 735 | 5,889 | *2,459 | 232,139 |
| 1975 | 805 | 4,872 | 1,194 | 828 | 5,809 | *2,154 | 229,891 |
| 1976 | 687 | 4,918 | 1,327 | 705 | 5,801 | *2,228 | 227,663 |
| 1977 | 684 | 4,044 | 1,200 | 655 | 5,769 | *2,896 | 224,769 |
| 1978 | 666 | 3,685 | 1,359 | 761 | 5,628 | *3,347 | 221,397 |
| 1979 | 851 | 3,699 | 1,553 | 611 | 5,497 | *3,111 | 218,286 |
| 1980 | 667 | 3,634 | 1,708 | 667 | 5,535 | *3,609 | 214,345 |
| 1981 | 691 | 3,488 | 1,848 | 737 | 5,606 | *4,012 | 210,267 |
| 1982 | 671 | 3,280 | 1,945 | 776 | 5,449 | *4,219 | 206,027 |
| 1983 | 684 | 3,432 | 1,756 | 649 | 5,483 | *3,772 | 202,241 |
| 1984 | 643 | 4,364 | 2,167 | 511 | 4,194 | *1,865 | 200,397 |
| 1985 | 539 | 4,871 | 4,241 | 809 | 5,076 | *4,716 | 193,913 |
| 1986 | 564 | 3,523 | 1,617 | 710 | 5,158 | *3,398 | 190,361 |
| 1987 | 555 | 3,414 | 985 | 734 | 4,794 | *2,992 | 187,369 |
| 1988 | 567 | 3,136 | 1,745 | 728 | 4,730 | *3,965 | 183,404 |
| 1989 | 502 | 3,035 | 1,636 | 712 | 4,585 | *3,719 | 179,685 |
| 1990 | 522 | 2,869 | 1,342 | 700 | 4,311 | *3,411 | 176,274 |
| 1991 | 489 | 2,532 | 1,367 | 718 | 4,239 | *3,732 | 172,542 |
| 1992 | 446 | 2,374 | 1,719 | 801 | 4,333 | *4,435 | 168,107 |
| 1993 | 549 | 2,003 | 1,384 | 762 | 4,248 | *4,182 | 163,925 |
| 1994 | 476 | 2,798 | 1,429 | 628 | 4,274 | *3,545 | 160,380 |
| 1995 | 394 | 2,718 | 1,254 | 628 | 4,184 | *3,384 | 156,996 |
| 1996 | 392 | 2,232 | 1,356 | 481 | 3,496 | *3,241 | 153,755 |
| 1997 | 433 | 3,131 | 1,416 | 570 | 4,014 | *3,002 | 150,753 |
| 1998 | 439 | 2,356 | 1,295 | 565 | 3,927 | *3,256 | 147,497 |
| 1999 | 540 | 2,168 | 1,280 | 551 | 4,308 | *2,815 | 144,682 |
| 2000 | 504 | 1,901 | 1,324 | 511 | 3,844 | *4,625 | 140,057 |
| 2001 | 567 | 1,837 | 1,153 | 429 | 3,659 | *2,180 | 137,877 |
| 2002 | 586 | 2,154 | 1,236 | 616 | 3,811 | *3,101 | 133,676 |
| 2003 | 497 | 1,945 | 1,509 | 566 | 3,730 | *3,760 | 129,916 |
| 2004 | 736 | 5,384 | 2,209 | 861 | 3,572 | *1,030 | 128,886 |
| 2005 | 591 | 2,658 | 2,344 | 601 | 3,582 | *3,064 | 125,822 |
| *Net Decrease | |||||||
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