| 2022 | $20.00 |
| 2020 | $20.00 |
| 2018 | $20.00 |
| 2016 | $20.00 |
| 2014 | $20.00 |
| 2012 | $20.00 |
| 2010 | $15.00 |
| 2008 | $15.00 |
| 2006 | $10.00 |
| 2004 | $10.00 |
| 2002 | $10.00 |
| 2000 | $10.00 |
| 1999 | $10.00 |
| 1998 | $10.00 |
| 1996 | $10.00 |
| 1994 | $10.00 |
| 1992 | No longer available in hard copy. PDF download only. |
| 1990 | $10.00 |
| 1988 | $10.00 |
| 1986 | $10.00 |
| 1984 (Supplement) | No longer available in hard copy. PDF download only. |
| 1984 | $10.00 |
| 1982 | No longer available in hard copy. PDF download only. |
| 1980 | $10.00 |
| 1978 | $10.00 |
| 1977 | $10.00 |
| 1976 | $10.00 |
| 1974 | $10.00 |
| 1972 | No longer available in hard copy. PDF download only. |
| 1971 | No longer available in hard copy. PDF download only. |
