You can get the info from the WAC 2018-19 Men's Basketball Media Guide (page 53)...
WAC Informational Guides
WAC TOURNAMENT ATTENDANCE
Year / Sessions / Site / Total Attendance / Session Average / Championship Game Attendance / Championship Game
1984 / 2 Sessions / El Paso, Texas / 24,020 / 12,010 / 12,010 /
UTEP over New Mexico (62-55)
1985 / 2 Sessions / El Paso, Texas / 23,279 / 11,640 / 11,728 /
San Diego State over UTEP (87-81)
1986 / 4 Sessions / Laramie, Wyo. / 37,520 / 9,380 / 12,039 /
UTEP over Wyoming (65-64)
1987 / 4 Sessions / Albuquerque, N.M. / 55,576 / 13,894 / 15,421 /
Wyoming over New Mexico (64-62)
1988 / 5 Sessions / Provo, Utah / 60,279 / 12,056 / 15,174 /
Wyoming over UTEP (79-75)
1989 / 5 Sessions / Salt Lake City / 29,138 / 5,828 / 6,401 /
UTEP over Colorado State (73-60)
1990 / 5 Sessions / El Paso, Texas / 38,572 / 7,714 / 10,732 /
UTEP over Hawaii (75-58)
1991 / 5 Sessions / Laramie, Wyo. / 39,589 / 7,918 / 6,259 /
BYU over Utah (51-49)
1992 / 4 Sessions / Fort Collins, Colo. / 18,303 / 4,576 / 4,971 /
BYU over UTEP (73-71)
1993 / 5 Sessions / Salt Lake City / 51,315 / 10,263 / 10,634 /
New Mexico over UTEP (76-65)
1994 / 5 Sessions / Salt Lake City / 38,888 / 7,778 / 9,762 /
Hawaii over BYU (73-66)
1995 / 5 Sessions / Albuquerque, N.M. / 47,461 / 9,492 / 8,145 /
Utah over Hawaii (67-54)
1996 / 5 Sessions / Albuquerque, N.M. / 46,600 / 9,320 / 13,503 /
New Mexico over Utah (64-60)
1997 / 6 Sessions / Las Vegas / 52,658 / 8,776 / 10,101 /
Utah over TCU (89-68)
1998 / 6 Sessions / Las Vegas / 81,764 / 13,627 / 16,101 /
UNLV over New Mexico (56-51)
1999 / 6 Sessions / Las Vegas / 47,646 / 7,941 / 10,767 /
Utah over New Mexico (60-45)
2000 / 4 Sessions / Fresno, Calif. / 32,406 / 8,102 / 10,021 /
Fresno State over Tulsa (75-72)
2001 / 5 Sessions / Tulsa, Okla. / 27,889 / 5,578 / 8,160 /
Hawaii over Tulsa (78-72)
2002 / 5 Sessions / Tulsa, Okla. / 32,119 / 6,424 / 8,355 /
Hawaii over Tulsa (73-59)
2003 / 5 Sessions / Tulsa, Okla. / 22,073 / 4,415 / 5,326 /
Tulsa over Nevada (75-63)
2004 / 5 Sessions / Fresno, Calif. / 30,241 / 6,048 / 6,158 /
Nevada over UTEP (66-60)
2005 / 5 Sessions / Reno, Nev. / 19,607 / 3,921 / 4,178 /
UTEP over Boise State (91-78)
2006 / 4 Sessions / Reno, Nev. / 30,859 / 7,715 / 9,436 /
Nevada over Utah State (91-78)
2007 / 5 Sessions / Las Cruces, N.M. / 49,650 / 9,930 / 11,948 /
New Mexico State over Utah State (72-70)
2008 / 5 Sessions / Las Cruces, N.M. / 36,950 / 7,390 / 10,921 /
Boise State over New Mexico State (107-102 3OT)
2009 / 5 Sessions / Reno, Nev. / 43,355 / 8,671 / 7,820 /
Utah State over Nevada (72-62)
2010 / 4 Sessions / Reno, Nev. / 17,877 / 4,469 / 2,748 /
New Mexico State vs. Utah State (69-63)
2011 / 4 Sessions / Las Vegas / 14,075 / 3,518 /4,372 /
Utah State over Boise State (77-69)
2012 / 4 Sessions / Las Vegas / 7,482 / 1,870 / 1,405 /
New Mexico State over Louisiana Tech (82-57)
2013 / 5 Sessions / Las Vegas / 4,938 / 987 / 1,142 /
New Mexico State over UT Arlington (64-55)
2014 / 4 Sessions / Las Vegas / 5,136 / 1,284 / 1,518 /
New Mexico State over Idaho (77-55)
2015 / 3 Sessions / Las Vegas / 4,546 / 1,515 / 1,763 /
New Mexico State over Seattle (80-61)
2016 / 3 Sessions / Las Vegas / 4,874 / 1,625 / 1,673 /
Cal State Bakersfield over New Mexico State (57-64)
2017 / 3 Sessions / Las Vegas / 6,488 / 2,163 / 2,444 /
New Mexico State over Cal State Bakersfield (70-60)
2018 / 4 Sessions / Las Vegas / 8,833 / 2,208 / 3,065 /
New Mexico State over Grand Canyon (72-58)
2019 / 4 Sessions / Las Vegas / 11,362 / 2,841 / 3,598 /
New Mexico State over Grand Canyon (89-57)
**Edited** for additional context I added the participants of the WAC Tournament Championship.