Year	US Dollars adjusted for inflation)
1991	2717.235
1992	2296.504
1993	1913.634
1994	1505.609
1995	1404.868
1996	1505.84
1997	1625.256
1998	1616.728
1999	1638.161
2000	1684.596
2001	1746.517
2002	1806.26
2003	1855.333
2004	1930.185
2005	1848.269
2006	1854.169
2007	1992.54
2008	2145.002
2009	2199.636
2010	2154.364
2011	2231.87
2012	2219.547
2013	2484.794
2014	2553.038
2015	2608.976
2016	2708.229
2017	2762.504
2018	2826.821
2019	2920.117
2020	3034.138
2021	3146.664
2022	3271.822