| Covers listed |
|
| 1973: | June, December, |
| 1974: | February, March, May, June, July, August, September, October, November, December, |
| 1975: | January, April, May, June, August, October, November, |
| 1976: | January, March, October, |
| 1977: | January, March, April, June, July, August, September, December, |
| 1978: | March, April, July, September, October, |
| 1979: | January, February, March, April, May, June, July, August, December, |
| 1980: | March, April, May, June, July, August, September, October, November, December, |
| 1981: | January, February, April, June, September, October, November, |
| 1982: | March, May, June, September, December, |
| 1983: | February, March, April, October, December, |
| 1984: | January, February, June, July, November, |
| 1985: | April, May, August, October, December, |
| 1987: | April, June, July, November, December, |
| 1988: | June, July, |
| 1989: | February, March, April, September, October, |
| 1990: | October, |
| 1991: | March, December, |
| 1992: | January, February, March, April, August, |
| 1993: | January, February, March, May, June, August, October, December, |
| 1994: | February, March, May, July, August, October, November, December, |
| 1995: | January, June, July, September, November, |
| 1996: | January, February, March, April, August, September, October, December, |
| 1997: | January, February, March, April, June, July, August, October, November, December, |
| 1998: | January, March, November, December, |
| 1999: | February, March, July, September, November, |
| 2000: | January, February, March, June, July, |
| 2001: | May, July, October, November, December, |
| 2002: | January, February, March, June, July, November, |
| 2003: | February, March, April, June, July, August, September, December, |
| 2009: | April, |
| 2010: | July/August, September, |
| 2011: | February, June, |
| 2012: | #38 / September, December 2012/ January 2013, |
| 2013: | May, September, December, |
| 2014: | December 2014/ January 2015, |
| 2016: | April, |
| 2017: | May, |
| 2018: | March, April, December 2018/ January 2019, |
| 2019: | September, |
