| Covers listed |
|
| 1969: | #2 / , |
| 1970: | #1 / , #4 / , |
| 1972: | April, |
| 1973: | #7 / , |
| 1974: | #1 / , #3 / , #6 / , |
| 1976: | February, |
| 1977: | #4 / , |
| 1978: | #6 / , #7-8 / , |
| 1979: | #2 / , |
| 1980: | #4-5 / , |
| 1981: | #4 , |
| 1982: | #6 / , |
| 1983: | #2 / , #5 / , #7 / , |
| 1984: | #5 / , |
| 1985: | #5 / , |
| 1986: | #7 / , |
| 1987: | #5-6 / , |
| 1988: | #1 / , #2 / , |
| 1991: | #1 , #2 , #3 , #4 , #5 , #6 , |
| 1992: | #1 , #2 , #3 , #4 , #5 , #6 , |
| 1993: | #1 , #2 , #3 , #4 , #5 , #6 , |
| 1994: | #1 , #2 , #3 , #4 , #5 , #6 , |
| 1995: | #1 , #2 , #3 , #4 , #5 , #6 , |
| 1996: | #1 , #2 , #3 , #4 , #5 , #6 , |
| 1997: | #1 , #2 , #3 , #4-5 , #6 , |
| 1998: | #1 , #2 , #3 , #4 , #5-6 , |
| 1999: | #1 , #2 , #3 , #4 , #5-6 , |
| 2000: | #1 , #2 , #3 , #4 , #5 , #6 , |
| 2001: | #1 , #2 , #3 , #4 , #5 , #6 , |
| 2002: | #1 , #2 , #3 , #4-5 , #6 , |
| 2003: | #1 , #2 , #3 , #4 , #5 , #6 , |
| 2004: | #1 , #2 , #3 , #4 , #5-6 , |
| 2005: | #1 , #2 , #3 , #4 , #5 , #6 , |
| 2006: | , , , , , , |
| 2007: | , , , , , |
| 2008: | , , , , , |
| 2009: | January/February, March/April, May/June, July/August, September/October, November/December, |
| 2010: | #1 /January/February, #2 /March/April, #3 /May/June, #4 /July/August/September, #5/6 /October/November/December, |
| 2011: | #1 /January/February, #2 /March/April, #3 /May/June, #4 /July/August, #5 /September/October, #6 /November/December, |
| 2012: | #1 , #2 , #3 , #4 , #5 , #6 , |
| 2013: | #1 , #2 , #3 , #4 , #5 , #6 , |
| 2014: | #1 , #2 /March/April, #3 /May/June, #4 /July/August, #5 /September/October, #6 /November/December, |
| 2015: | #1 /January/February, #2 /March/April, #3 /May/June, #4 /July/August, #5 /September/October, #6 /November/December, |
| 2016: | #1 /January/February, #2 /March/April, #3 /May/June, #4 /July/August, #5 /September/October, #6 /November/December, |
| 2017: | #1 /January/February, #2 /March/April, #3 /May/June, #4 / July/August, #5 / September/October, #6 / November/December, |
| 2018: | #1 / January/February, #2 , #3 / May/June, #4 / July/August, #5 , #6 / November/December, |
| 2019: | #1 / January/February, #2 / March/April, #3 / May/June, #4 / July/August, #5 / September/October, #6 / November/December, |
| 2020: | #1 / January/February, #2 / March/April, #3 / May/June, #4 / July/August, #5 / September/October, #6 / November/December, |
| 2021: | #1 / January/February, #2 / , #3 / , #4 / , #5 / , #6 / , |
| 2022: | #1 / , #2 / , #3 / , #4 / , #5 / , #6 / , |
| 2023: | #1 / , #2 / , #3 / , #4 / , #5 / , #6 / , |
| 2024: | #1 / , #2 / , #3 / , #4 / , #5 / , #6 / , |
| 2025: | #1 / , #2 / , #3 / , #4 / , #5 / , #6 / , |
| 2026: | #1 / , #2 / , #3 / , |
