| Covers listed |
|
| 1975: | February, #34 / August, |
| 1978: | March, |
| 1983: | May, |
| 1987: | August, |
| 1996: | December, |
| 1997: | November, |
| 1998: | June, September, December, |
| 1999: | February, June, December, |
| 2000: | March, May, December, |
| 2001: | January, February, April, July, August, November, |
| 2002: | January, August, October, |
| 2003: | January, April, May, June, July, October, December, |
| 2004: | February, March, April, May, |
| 2005: | July, August, November, |
| 2006: | January, February, March, April, June, August, October, |
| 2007: | January, February, March, May, July, August, December, |
| 2008: | April, December, |
| 2009: | April, August, |
| 2010: | February, March, April, May, September, December, |
| 2011: | February, May, June, August, September, October, November, December, |
| 2012: | March, July, August, October, |
| 2013: | May, July, August, October, |
| 2014: | January, July, September, November, |
| 2015: | February, May, July, November, |
| 2016: | March, |
