| Covers listed | |
| 1989: | May, |
| 1993: | January, December, |
| 1994: | April, October, |
| 1995: | January, April, May, June, July, August, September, December, |
| 1996: | Annual , |
| 1997: | August, |
| 1998: | January, February, April, June, July, September, October, Annual , |
| 1999: | June, September, |
| 2000: | January, June, July, August, October, November, Annual , |
| 2001: | January, March, April, June, July, August, October, November, |
| 2002: | March, August, |
| 2003: | July, October, |
| 2004: | March, October, |
| 2005: | January, February, April, May, June, July, September, |
