Year	US Dollars adjusted for inflation)
1990	21441966.95709
1991	22215842.92059
1992	22835413.14008
1993	23774106.41613
1994	26218913.56128
1995	24906804.46689
1996	23422019.89707
1997	25764977.08684
1998	29758862.86182
1999	29293496.33227
2000	29009173.71137
2001	29483214.83631
2002	31808312.56498
2003	30747970.84524
2004	30332202.59055
2005	29185727.24122
2006	29809991.94763
2007	31703094.82551
2008	34234035.60025
2009	32716491.67604
2010	31823518.62044
2011	34215328.61844
2012	32902991.30391
2013	34408843.30664
2014	34872648.32119
2015	38061023.84111
2016	39216157.2757
2017	40487383.96264