| Covers listed |
|
| 1969: | #1 /September, #2 /October, #3 /November, #4 /December, |
| 1970: | #5 /January, #6 /February, #7 /March, #8 /April, #9 /May, #10 /June, #11 /July, #12 /August, #13 Vol 2 # 1/September, #14 Vol 2 # 2/October, #15 Vol 2 # 3/November, #16 Vol 2 # 4/December, |
| 1971: | Vol 2 # 5August, #v2n6 / October, |
| 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, 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: | January, February, March, April, May, June, July, August, September, October, November/December, |
| 2002: | January, February, March, April, May, June, July, August, September, October, November/December, |
| 2003: | January, February, March, April/May, June, July/August, September, October, November, Dec.'03/Jan.'04, |
| 2004: | February, March, April, May, June, July, August, September, October, November, December, |
| 2005: | February, March, April, May, June, July, August, September, October, November/December, |
| 2006: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 2007: | February, March, April, May, June, July, August, September, October, November, December, |
| 2008: | February, March, April, May, June/July, August, September, October, November, December, |
| 2009: | February, March, April, May, June/July, August, September, October/November, December, |
| 2010: | February, March, April, May, June/July, August, September, October, November, December, |
| 2011: | February, March, April, May, June/July, August, September, October, November, December, |
| 2012: | February, March, April, May, June/July, August, September, |
| 2013: | June-July, May, August, September, October, November, December, |
| 2014: | February, March, April, May, June, August, September, October, November, December, |
| 2015: | January, February, April, May, June, September, October, November, December 2015/ January 2016, |
| 2016: | February, April, May, June, August, September, October, December, |
| 2017: | February, March, April, May, August, September, October, November, December 2017/ January 2018, |
| 2018: | March, April/May, #521 / September, #522 /Fall, #523 /Winter, |
| 2019: | #524 / March, #525 /Spring, #526 /Summer, #527 / September, #528 /Fall, #529 /Winter, |
| 2020: | #530 / March, #531 /Spring, #532 / September, #534 /Winter, |
| 2021: | #535 / March, #536 /Spring, #537 /Summer, #538 /September, #539 /Fall, |
| 2022: | Winter, |
| 2023: | #548 /Spring, #549 /Summer, |
| 2024: | #553 / March, #554 /Spring, #556 / September, #558 /Winter, |
| 2025: | #559 / March, #562 / September, #563 /Fall, |
| 2026: | #565 / March, |
