Year	current US$
1986	18895439.7056046
1987	22455065.9539742
1988	27498974.1823043
1989	32463367.3045652
1990	35916973.411509
1991	41005940.1999451
1992	45024103.5599811
1993	50545102.4247271
1994	58157348.579096
1995	61936966.6209244
1996	64621926.7025315
1997	71576847.9800604
1998	78746460.0439771
1999	74775728.2725476
2000	75726749.5013877
2001	86352175.504874
2002	85887084.3380439
2003	100143063.816809
2004	116820377.091318
2005	106927002.786302
2006	118376478.140783
2007	99287625.6983242
2008	123504502.793296
2009	136306776.536313
2010	152222234.636871
2011	138015821.22905
2012	171263403.583505
2013	175759623.644738
2014	163312826.486939
2015	174477003.10819
2016	163850845.134458
2017	168054043.970204
2018	171842707.140957
2019	184967216.19328
2020	146213324.962984
2021	174471453.093207