| Covers listed |
|
| 1967: | June, July, August, September, October, November, December, |
| 1968: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1969: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1970: | January, February, March, March, April, May, June, July, August, September, October, November, December, |
| 1971: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1972: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1973: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1974: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1975: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1976: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1977: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1978: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1979: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1980: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1981: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1982: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1983: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1984: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1985: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1986: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1987: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1988: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1989: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1990: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1991: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1992: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1993: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1994: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1995: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1996: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1997: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1998: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1999: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 2000: | January, February, March, April, May, June, July, August/September, October, November, December, |
| 2001: | February, March, July/August, September/October, CollectionOctober/November, November, December, |
