| Covers listed | |
| 1971: | April, |
| 1972: | December, |
| 1982: | April, May, |
| 1983: | April, December, |
| 1984: | September, |
| 1985: | January, September, |
| 1986: | April, May, December, |
| 1989: | March, May, |
| 1990: | May, #112 / August, |
| 1991: | April, May, |
| 1992: | July, December, |
| 1996: | May, |
| 2002: | December, |
| 2003: | February, November, |
| 2004: | February, |
| 2007: | January, |
| 2009: | December, |
| 2010: | #91 / May, |
| 2011: | June, #105 / July, November, December, |
| 2012: | April, May, |
| 2013: | February, August, October, November, |
| 2014: | February, September, |
| 2015: | May, |
| 2016: | February, November, December, |
| 2017: | April, |
| 2018: | November, |
| 2019: | October, |
