| Covers listed |
|
| 1976: | #15 / September, |
| 1977: | March, May, June, July, August, #27 / September, |
| 1978: | April, September, |
| 1979: | June, |
| 1980: | January, April, August, September, October, |
| 1981: | May, December, |
| 1982: | January, July, October, November, |
| 1983: | May, June, November, |
| 1984: | January, February, April, June, July, August, October, |
| 1985: | January, May, August, |
| 1986: | February, May, October, December, |
| 1987: | January, July, December, |
| 1988: | July, August, September, October, November, December, |
| 1989: | August, November, |
| 1990: | #550 / February, June, July, November, |
| 1991: | January, April, July, August, September, December, |
| 1992: | April, May, June, #590 / July, August, |
| 1993: | April, May, |
| 1994: | April, |
| 1995: | July, |
| 1996: | January, February, June, July, September, November, |
| 1997: | March, May, June, July, August, September, October, |
| 1998: | January, February, April, May, September, |
| 1999: | April, May, December, |
| 2001: | August, September, December, |
| 2002: | #325 / March, |
| 2003: | #340 / June, |
| 2004: | #347 / January, June, #353 / July, |
| 2005: | #360 / February, |
| 2006: | #377 / July, #382 / December, |
| 2007: | #395 / December, |
