| Covers listed | |
| 1972: | November, |
| 1973: | January, February, December, |
| 1974: | May, August, |
| 1976: | July, |
| 1979: | May, June, September, |
| 1980: | June, |
| 1981: | January, |
| 1982: | December, |
| 1984: | January, |
| 1985: | February, May, |
| 1986: | April, |
| 1987: | September, |
| 1989: | December, |
| 1990: | July, October, |
| 1991: | July, August, |
| 1993: | August, |
