Year	US Dollars adjusted for inflation)
1990	2381.64689
1991	2453.9758
1992	2506.9067
1993	2596.56033
1994	2852.98298
1995	2698.46202
1996	2530.46887
1997	2777.29623
1998	3197.81462
1999	3134.67055
2000	3079.53012
2001	3099.58104
2002	3301.32979
2003	3148.14896
2004	3065.71686
2005	2910.7138
2006	2940.71145
2007	3095.09859
2008	3310.83516
2009	3133.46343
2010	3021.88953
2011	3219.35723
2012	3067.87798
2013	3180.40885
2014	3196.97913
2015	3459.77855
2016	3533.94226
2017	3617.52895