Year	US Dollars adjusted for inflation)
1991	1463.324
1992	1504.703
1993	1538.862
1994	1597.714
1995	1685.231
1996	1779.941
1997	1822.563
1998	1896.84
1999	2023.4
2000	2068.889
2001	2109.39
2002	2132.823
2003	2232.507
2004	2345.614
2005	2493.374
2006	2714.065
2007	2968.495
2008	3084.528
2009	3323.965
2010	3649.342
2011	3867.183
2012	4054.074
2013	4231.421
2014	4465.007
2015	4732.915
2016	4982.217
2017	5253.95
2018	5590.82
2019	5933.622
2020	6288.645
2021	6654.803
2022	7033.14