(The) Leading Edge
| 1981 |
#1 Winter |
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#2 Fall |
| 1982 |
#3 Winter |
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#4 Fall |
| 1983 |
#5 Winter |
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#6 Fall |
| 1984 |
#7 Winter |
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#8 Fall |
| 1985 |
#9 Winter |
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 #10 Fall |
| 1986 |
 #11 Winter |
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#12 Fall |
| 1987 |
#13 Winter |
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#14 Summer |
#15 Fall |
| 1988 |
#16 Winter |
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#17 Summer |
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| 1989 |
#18 Jan |
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#19 Sep |
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| 1990 |
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#20/21 Apr |
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#22 Fall |
| 1991 |
#23 Winter |
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#24 Sep |
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| 1992 |
 #25 Jan |
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 #26 Oct |
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| 1993 |
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 #27 Jun |
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| 1994 |
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 #28 Feb |
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 #29 Aug |
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| 1995 |
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#30 Feb |
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#31 Aug |
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| 1996 |
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#32 Feb |
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#33 Oct |
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| 1997 |
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#34 Feb |
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| 1998 |
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#35 Feb |
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#36 Sep |
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| 1999 |
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#37 Mar |
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#38 Nov |
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| 2000 |
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#39 Mar |
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 #40 Sep |
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| 2001 |
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 #41 Apr |
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 #42 Oct |
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| 2002 |
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#43 Apr |
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 #44 Dec |
| 2003 |
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 #45 Apr |
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 #46 Oct |
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| 2004 |
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 #47 Apr |
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 #48 Oct |
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| 2005 |
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 #49 Apr |
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 #50 Oct |
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| 2006 |
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 #51 Apr |
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 #52 Oct |
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| 2007 |
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 #53 Apr |
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 #54 Nov |
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| 2008 |
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 #55 May |
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 #56 Dec |
| 2009 |
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 #57 Jun |
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 #58 Dec |
| 2010 |
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 #59 Jun |
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 #60 Dec |
| 2011 |
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 #61 Jun |
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| 2012 |
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 #62 Jun |
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 #63 Dec |
| 2013 |
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 #64 Jul |
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| 2014 |
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 #65 Feb |
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| 2015 |
 #66 Jan |
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 #67 Aug |
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 #67¾ Dec |
| 2016 |
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 #68 Mar |
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 #69 Dec |
| 2017 |
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 #70 Apr |
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 #71 Dec |
| 2018 |
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 #72 Apr |
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| 2019 |
 #73 Jan |
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 #74 Apr |
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 #75 Dec |
| 2020 |
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 #76 May |
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 #77 Dec |
| 2021 |
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 #78 Apr |
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 #79 Dec |
| 2022 |
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 #80 Apr |
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 #81 Dec |
| 2023 |
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 #82 Apr |
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| 2024 |
 #83 Jan |
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 #84 May |
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 #85 Dec |
| 2025 |
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 #86 May |
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