| Covers listed | |
| 1981: | #1 /May, |
| 1982: | #2 /May, |
| 1984: | #3 /January, |
| 1985: | #4 /November, |
| 1986: | #5 /October, |
| 1988: | #6 /May, |
| 1990: | #7 /May, |
| 1992: | #8 , |
| 1994: | #9 /May, |
| 1995: | #10 , |
| 1996: | #11 /July, |
| 1997: | #12 /May, |
| 1998: | #13 , |
| 1999: | #14 , |
| 2000: | #15 , |
| 2001: | #16 , |
| 2002: | #17 , |
| 2003: | #18 , |
| 2004: | #19 , |
| 2005: | #20 , |
| 2006: | #21 /May, |
| 2007: | #22 /May, |
| 2009: | #24 , |
| 2010: | #25 , |
