Year	US Dollars adjusted for inflation)
1991	13641.658
1992	14046.49
1993	14718.705
1994	15739.32
1995	16809.906
1996	17679.104
1997	18667.01
1998	19264.98
1999	20773.9
2000	22335.207
2001	22855.916
2002	24047.211
2003	24868.904
2004	26115.479
2005	26204.316
2006	26872.795
2007	27401.537
2008	27434.461
2009	28121.307
2010	29195.963
2011	30559.953
2012	30997.791
2013	31434.219
2014	31766.414
2015	32570.08
2016	32865.52
2017	34112.934
2018	35499.688
2019	37031.781
2020	38376.645
2021	39924.07
2022	41677.559