Year	US Dollars adjusted for inflation)
1991	19999.895
1992	20932.732
1993	23757.205
1994	21001.287
1995	22117.055
1996	23152.312
1997	25005.16
1998	24950.945
1999	23834.098
2000	26014.264
2001	24562.488
2002	26351.316
2003	28093.393
2004	30955.211
2005	33000.121
2006	34721.012
2007	35896.805
2008	35385.023
2009	33601.082
2010	34259.895
2011	35790.516
2012	36570.938
2013	38432.844
2014	39742.09
2015	40781.926
2016	40809.203
2017	43296.438
2018	44215.445
2019	45190.316
2020	46316.164
2021	47586
2022	49014.133