| Covers listed |
|
| 1973: | , #1 / , #2 / , |
| 1974: | #1 / , #2 , #3 / , #4 / , |
| 1975: | #1 , #2 , #3 , #4 , |
| 1976: | #1 , #2 , #3 , #4 / , |
| 1977: | #1 , #2 , #3 / , #4 , #5 / , |
| 1978: | #1 , #2 / , #3 , #4 , |
| 1979: | #1 , #2 , #3 , #4 , |
| 1980: | #1 , #3 , #4 , |
| 1981: | #1 , #2 , #3 , #4 , |
| 1982: | #1 , #2 , #3 , #4 , |
| 1983: | #1 , #2 , #3 , #4 , |
| 1984: | #1 , #2 /February, #3 , |
| 1985: | #1 , #2 , #3 , |
| 1986: | #1 , #2 , #3 , #4 , |
| 1987: | #1 , #2 /Autumn, #3 /Winter, |
| 1988: | #4 /Spring, #1 , #2 /Autumn, #3 /Winter, |
| 1989: | #4 /Spring, Summer, Autumn, Winter, |
| 1990: | #4 /Spring, #1 /Summer, #2 /Autumn, #3 /June/July, #4 /August/September, #5 /November/December, |
| 1991: | #1 /January/February, #2 /March/April, #3 /May/June, #4 /July/August, #5 /September/October, #6 /November/December, |
| 1992: | #1 /January/February, #2 /March/April, May/June, #4 /July/August, #5 /September/October, #6 /November/December, |
| 1993: | #1 /January/February, March/April, May/June, July/August, September/October, #6 /December, |
| 1994: | #1 /February, April, June, Summer, August, October, December, |
| 1995: | February, April, #3 /June, #4 /August, #5 /October, December, |
| 1996: | #1 /February, #2 /April, #3 /June, #4 /August, #5 /October, #6 /December, |
| 1997: | #1 /February, #2 /April, #3 /June, #4 /August, #5 /October, #6 /December, |
| 1998: | #1 /February, #2 /April, #3 /June, #4 /August, #5 /October, #6 /December, |
| 1999: | #1 /February, #2 /April, #3 /June, #4 /August, #5 /October, #6 /December, |
| 2000: | #1 /February, #2 /April, #3 /June, #4 /August, #5 /October, #6 /December, |
