| Covers listed |
|
| 1981: | August, |
| 1982: | July, |
| 1983: | January, February, April, May, July, August, September, October, November, December, |
| 1984: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1985: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1986: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1987: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1988: | January, February, March, April, May, June, July, August, September, October, November, |
| 1989: | January, February, April, |
| 1990: | March, |
| 1992: | October, |
| 1996: | July, August, September, November, December, |
| 1997: | March, April, May, August, November, December, |
| 1998: | January, February, May, June, July, August, November, |
| 2000: | February, |
