| Covers listed |
|
| 1964: | 15 September, |
| 1965: | January, June, July, |
| 1966: | 15 April, June, |
| 1967: | 1 April, August, 15 October, December, |
| 1968: | May, June, |
| 1969: | January, September, |
| 1970: | November, |
| 1971: | 1 April, |
| 1972: | March, September, |
| 1973: | July, September, |
| 1974: | September, December, |
| 1975: | September, |
| 1976: | May, September, |
| 1979: | December, |
| 1983: | September, |
| 1984: | July, |
| 1985: | January, |
| 1986: | May, August, December, |
| 1989: | February, April, September, December, |
| 1990: | November, |
| 1992: | June, July, August, |
| 1994: | January, February, |
| 1996: | March, October, |
| 1997: | January, |
| 1998: | February, December, |
| 1999: | May, August, |
| 2000: | November, |
| 2001: | March, June, |
| 2002: | February, April, May, October, October, December, |
| 2003: | January, February, June, July, October, November, December, |
| 2004: | February, May, July, October, December, |
| 2005: | June, October, December, |
| 2006: | February, April, October, November, |
| 2007: | January, August, October, November, |
| 2008: | January, July, August, |
| 2009: | January, March, July, October, |
| 2010: | January, May, July, December, |
| 2011: | January, April, November, |
| 2012: | April, May, July, August, October, November, |
| 2013: | March, July, November, |
| 2014: | January, June, September, October, |
| 2015: | May, August, September, October, November, |
| 2016: | July, August, September, November, December, |
| 2017: | May, October, November, |
| 2018: | February, June, |
| 2019: | February, April, May, June, July, November, December, |
| 2020: | February, March, April, June, October, December, |
| 2021: | January, March, May, June, August, September, October, |
| 2022: | April, October, December, |
| 2023: | February, March, June, July, August, October, November, December, |
| 2024: | January, February, March, May, June, September, October, November, |
| 2025: | January, February, March, June, July, November, December, |
| 2026: | January, |
