Year	current US$
1990	28839885.5976772
1991	28564635.3253318
1992	18620358.1567624
1993	18789511.4906183
1994	18890354.6949554
1995	18956055.1192211
1996	18782416.7802801
1997	18211710.5188014
1998	17803915.8675335
1999	14378316.0810109
2000	14106824.5560747
2001	14166993.8685212
2002	20757344.2134909
2003	25635717.7144967
2004	22724308.3164222
2005	36062680.5529222
2006	43161868.1094046
2007	45583248.7023054
2008	95542351.7235473
2009	134773290.845526
2010	203191308.659984
2011	266367505.599343
2012	251045989.834911
2013	193629055.040256
2014	164313297.803079
2015	206898266.141553
2016	190331244.55207
2017	178853711.533849
2018	237814992.779305
2019	247935835.207471
2020	232300711.904042
2021	182230038.02345