Year	US Dollars adjusted for inflation)
1991	13512.544
1992	13738.964
1993	13640.222
1994	13689.637
1995	13332.349
1996	13555.862
1997	13906.956
1998	14643.037
1999	14443.835
2000	14699.871
2001	14571.642
2002	14379.872
2003	14485.979
2004	14904.525
2005	15186.132
2006	16135.946
2007	17094.992
2008	17570.916
2009	17432.855
2010	18196.494
2011	20090.086
2012	21016.299
2013	21549.273
2014	22635.719
2015	23238.492
2016	23714.049
2017	24680.26
2018	25685.396
2019	26726.797
2020	27812.584
2021	28957.867
2022	30156.904