Year	US Dollars adjusted for inflation)
1991	4179.629
1992	4078.968
1993	4025.561
1994	2688.08
1995	2673.066
1996	2572.186
1997	2638.978
1998	2456.877
1999	2375.432
2000	2353.425
2001	2460.387
2002	2626.777
2003	2812.613
2004	3002.81
2005	3257.544
2006	3503.097
2007	3619.005
2008	3976.225
2009	3962.006
2010	4384.468
2011	4602.995
2012	4683.134
2013	5002.004
2014	5192.362
2015	4835.749
2016	5221.866
2017	5496.895
2018	5797.729
2019	6096.224
2020	6406.537
2021	6752.355
2022	7119.855