| Covers listed |
|
| 1981: | November, December, |
| 1983: | March, |
| 1984: | May, |
| 1986: | September, |
| 1990: | January, |
| 1994: | February, |
| 1996: | March, |
| 1997: | November, |
| 1998: | July, October, |
| 1999: | January, June, |
| 2000: | March, July, September, November, December, |
| 2001: | January, February, April, July, September, October, November, |
| 2002: | January, February, March, April, May, June, July, October, November, |
| 2003: | February, March, April, September, November, |
| 2004: | March, April, September, |
| 2005: | April, June, July, November, |
| 2006: | January, March, April, July, |
| 2007: | April, December, |
| 2008: | May, July, November, |
| 2009: | January, April, June, October, |
| 2010: | August, November, |
| 2011: | January, May, July, September, |
| 2012: | February, April, May, June, September, November, December, |
| 2013: | January, February, May, June, August, October, |
| 2014: | February, April, May, September, October, November, December, |
| 2015: | January, July, September, October, November, |
| 2016: | February, March, May, September, December, |
| 2017: | January, February, March, June, October, |
| 2018: | March, May, September, December, |
| 2019: | January, July, September, October, |
| 2020: | January, April, May, June, July, October, |
| 2021: | January, March, April, May, July, October, December, |
| 2022: | January, March, July, August, September, October, November, |
| 2023: | February, May, July, August/September, October, November, December, |
| 2024: | January/February, March, April, July/August, September, October, |
| 2025: | March, May, June, |
