| Covers listed |
|
| 1977: | #3 / March, #4 / April, May, June, August, September, October, November, |
| 1978: | February, March, August, October, December, |
| 1979: | January, March, July, October, November, December, |
| 1980: | February, March, June, August, September, October, December, |
| 1981: | January, May, August, September, |
| 1982: | January, February, March, May, July, September, October, November, December, |
| 1983: | February, March, April, May, July, August, November, |
| 1984: | March, April, May, June, July, September, October, November, December, |
| 1985: | April, May, June, July, August, September, November, December, |
| 1986: | February, April, May, June, July, September, November, December, |
| 1987: | January, February, March, April, May, June, July, August, September, October, November, |
| 1988: | August, |
| 1989: | January, April, June, July, August, September, November, December, |
| 1990: | January, February, April, May, June, July, |
| 1991: | March, April, May, June, August/September, October, |
| 1992: | January, March, May, September, |
