| Covers listed |
|
| 1974: | #1 /January, #2 /April, #3 /July, #4 /December, |
| 1975: | #5 /March/April, #6 /July-August, #7 /November/December, |
| 1976: | #8 /March/April/May, #9 /June/July/August, #10 /September/October, |
| 1977: | #11 /January/February/March, #12 /April/May/June, #13 /July/August/September, #14 /October/November/December, |
| 1978: | #15 /January/February/March, #16 /April/May/June, #17 /August/September, #18 /October/November/December, |
| 1979: | #19 /January/February, #20 /March/April, #21 /May/June, #22 /July/August, #23 /September/October, #24 /December/Jan, |
| 1980: | #25 /February/March, #26 /April/May, #27 /June/July, #28 /August/September, #29 /October/November, #30 /December, |
| 1981: | #31 /March/April, #32 /May/June, #33 /July/August, #34 /September/October, #35 /November/December, |
| 1982: | #36 /February, #37 /April, #38 /June, #39 /August, #40 /October, #41 /December, |
| 1983: | #42 /March, #43 /May/June, |
| 1984: | #44 //45 April, #46 /July, #47 /August, #48 /October/November, #49 /December, |
| 1985: | #50 /February/March, #51 /May, #52 /July, #53 /September, #54 /November, |
| 1986: | #55 /January, #56 /March, #57 /May, #58 /July/August, #59 /September/October, #60 /November/December, |
| 1987: | #61 /January/February, #62 /March/April, #63 /May/June, #64 /July/August, #65 /September/October, #66 /November/December, |
| 1988: | #67 /January/February, #68 /March/April, #69 /May/June, #70 /November/December, |
| 1989: | #71 /January/February, #72 /March/April, #73 /May/June, #74 /July/August, #75 /September/October, #76 /November/December, |
| 1990: | #77 /January/February, #78 /March/April, #79 /May/June, #80 /July/August, #81 /November/December, |
| 1991: | #82 /March/April, #83 /May/June, #84 /July/August, #85 /November/December, |
| 1992: | #86 /January/February, #87 /March/April, #88 /May/June, #89 /July/August, #90 /September/October, |
| 1993: | #91 /January/February, #92 /March/April, #93 /May/June, #94 /August, #95 /September/October, #96 /November/December, |
| 1994: | #97/98 /April/ May, #99 /June/July, #100 /August, #101 /October/November, #102 /December, |
| 1995: | #103 /March/April/May, #104 /June/July, #105 /August/September, #106 /October/November, #107 /December, |
| 1996: | #108 /January/February, #109 /March/April, #110 /May/June, #111 /Summer/August, #112 /September/October, #113 /November/December, |
| 1997: | #114 /January/February, #115 /March/April, #116 /May, #117 /June, #118 /July, #119 /August/September, #120 /October, #121 /November, #122 /December, |
| 1998: | #123 /March/April, #124 /May, #125 /June/July, #126 /August/September, #127 /October/November, #128 /December, |
| 1999: | #129 /January, #130 /June, |
| 2000: | #131 , #132 /May, #133 /June/July, #134 /August/September, #135 /October/November, #136 /December, |
| 2001: | #137 /February, |
