Year	current US$
1992	5894214.09278811
1993	8833874.80529069
1994	10689890.6413313
1995	12229712.9801426
1996	13848053.0498675
1997	13741563.3914592
1998	10442681.4223033
1999	11538154.8798235
2000	11879431.2051155
2001	13584788.6410477
2002	13703878.2579738
2003	14498889.1369392
2004	15002456.5504153
2005	13959748.2949725
2006	12752369.7245791
2007	13134156.3016804
2008	12076982.5358689
2009	12980214.1498498
2010	14289121.2970729
2011	17002180.4140832
2012	19263430.2431199
2013	20688246.6095228
2014	21885991.2192242
2015	22602331.4907937
2016	23701626.7689199
2017	26940307.9014886
2018	33301934.7307585
2019	35885450.0885143
2020	38692342.2915013
2021	42965131.7777263