| Covers listed |
|
| 1989: | #1 /November, |
| 1990: | #2 /February, #3 /May, #4 /August, #5 /December, |
| 1991: | #6 /March, #7 /June, #8 /September, |
| 1992: | #9 /March, #10 /June, #11 /September, #12 /December, |
| 1993: | #13 /March, #14 /June, #15 /September, #16 /December, |
| 1994: | #17 /March, #18 /June, #19 /September, #20 /December, |
| 1995: | #21 /March, #22 /June, #23 /September, #24 /December, |
| 1996: | #25 /March, #26 /June, #27 /September, #28 /December, |
| 1997: | #29 /March, #30 /June, #31 /September, #32 /December, |
| 1998: | #33 /March, #34 /June, #35 /September, #36 /December, |
| 1999: | #37 /March, #38 /June, #39 /September, #40 /December, |
| 2000: | #41 /March, #42 /June, #43 /September, #44 /December, |
| 2001: | #45 /March, #46 /June, #47 /September, #48 /December, |
| 2002: | #49 /March, #50 /June, #51 /September, #52 /December, |
| 2003: | #53 /March, #54 /June, #55 /September, #56 /December, |
| 2004: | #57 /March, #58 /June, #59 /September, #60 /December, |
| 2005: | #61 /March, #62 /June, #63 /September, #64 /December, |
| 2006: | #65 /March, #66 /June, #67 /September, #68 /December, |
| 2007: | #69 /March, #70 /June, #71 /September, #72 /December, |
| 2008: | #73 /March, #74 /June, #75 /September, #76 /December, |
| 2009: | #77 /March, #78 /June/July/August, #79 /September/October/November, #80 /December, |
| 2010: | #81 /March/April/May, #82 /June/July/August, #83 /September/October/November, #84 /December, |
| 2011: | #85 /March/April/May, #86 /June/July/August, #87 /September/October/November, #88 /December, |
| 2012: | #89 /March/April/May, #90 /June/July/August, #91 /September/October/November, #92 /December, |
| 2013: | #93 /March, |
