Fiscal Year	Rate
1980	$50.25
1981	$56.40
1982	$24.60
1983	$25.00
1984	$24.33
1985	$24.90
1986	$23.90
1987	$14.50
1988	$15.15
1989	$15.65
1990	$10.67
1991	$10.93
1992	$11.26
1993	$14.17
1994	$14.59
1995	$15.17
1996	$17.26
1997	$17.26
1998	$18.30
1999	$18.30
2000	$19.19
2001	$19.92
2002	$17.11
2003	$17.72
2004	$18.21
2005	$12.57
2006	$12.31
2007	$11.64
2008	$12.11
2009	$13.07
2010	$14.86
2011	$15.67
2012	$16.67
2013	$17.46
2014	$18.87
2015	$19.98
2016	$20.47
2017	$20.48
2018	$20.27
2019	$20.14
2020	$19.74