| Covers listed |
|
| 1907: | November, |
| 1965: | February, |
| 1968: | November, |
| 1971: | November, |
| 1972: | October, November, |
| 1973: | January, |
| 1975: | December, |
| 1977: | May, |
| 1978: | March, |
| 1984: | September, |
| 1985: | August, September, |
| 1986: | August, |
| 1989: | September, |
| 1991: | April, September, |
| 1995: | July, September, November, |
| 1996: | March, April, |
| 1997: | January, |
| 1998: | February, August, December, |
| 1999: | January, May, |
| 2000: | March, August, October, |
| 2001: | January, December, |
| 2002: | January, August, |
| 2003: | January, June, July, October, November, |
| 2004: | January, May, July, August, October, November, December, |
| 2005: | January, February, April, June, August, September, October, November, December, |
| 2006: | January, February, April, May, June, July, September, October, December, |
| 2007: | January, March, September, November, December, |
| 2008: | January, February, March, April, May, July, August, October, December, |
| 2009: | February, May, June, July, December, |
| 2010: | January, April, August, September, September, November, |
| 2011: | February, April, August, |
| 2012: | February, March, April, May, October, November, |
| 2013: | February, March, April, May, September, October, |
| 2014: | June/July, August, September, November, December, |
| 2015: | February, March, June/July, August, December 2015/ January 2016, |
| 2016: | February, March, April, May, June/July, November, |
| 2017: | February, May, August, October, November, December 2017/ January 2018, |
| 2018: | February, March, April, November, December 2018/ January 2019, |
| 2019: | February, April, June/July, October, November, December 2019/ January 2020, |
| 2020: | February, March, May, October, December 2020/ January 2021, |
| 2021: | April, August, October, |
| 2022: | April, August, September, October, |
| 2023: | February, April, June/July, August, September, October, December, |
| 2024: | August, December 2024/ January 2025, |
| 2025: | February, March, |
