| Covers listed | |
| 1999: | September, |
| 2009: | September, |
| 2010: | December, |
| 2011: | October, |
| 2012: | January, July, |
| 2013: | February, |
| 2014: | January, |
| 2015: | February, |
| 2016: | January, May, July, September, |
| 2017: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 2018: | January, February, March, April, May, June, July, August, September, |
