| Covers listed | |
| 1969: | September, |
| 1970: | May, |
| 1971: | April, |
| 1972: | December, |
| 1974: | February, |
| 1977: | August, |
| 1978: | August, December, |
| 1979: | March, April, October, |
| 1980: | February, June, December, |
| 1982: | September, |
| 1983: | May, November, |
| 1984: | February, August, |
| 1985: | 15 January, , , |
| 1988: | January, |
| 1992: | #21 / September, #22 / October, |
| 1994: | , |
| 2002: | July, |
| 2003: | February, |
| 2005: | April, May, December, |
| 2006: | March, |
| 2011: | February, |
