Year	US Dollars adjusted for inflation)
1991	826.407
1992	811.295
1993	821.964
1994	814.569
1995	841.872
1996	916.41
1997	953.585
1998	1001.131
1999	1052.547
2000	1048.327
2001	1097.051
2002	1122.179
2003	1185.783
2004	1220.397
2005	1306.118
2006	1338.022
2007	1398.126
2008	1475.862
2009	1494.274
2010	1595.798
2011	1676.046
2012	1759.414
2013	1784.138
2014	1834.259
2015	1846.006
2016	1892.347
2017	1973.964
2018	2053.857
2019	2120.951
2020	2192.305
2021	2261.661
2022	2335.44