Year	current US$
1984	1962027995.3379955
1985	2008904440.5594406
1986	2182662500
1987	2158700037.5
1988	2186274937.5
1989	2399874987.5
1990	2276624962.5
1991	1371183305.5555556
1992	1255885604.2381635
1993	1803668217.0238824
1994	2533691718.5109086
1995	3031512870.3578844
1996	3892517182.7378836
1997	2823851124.7443767
1998	3187631847.0494843
1999	3768699565.532223
2000	4288615493.583689
2001	4856508770.708618
2002	5506127595.8685465
2003	7032648019.030161
2004	8809287176.660116
2005	10052727912.357166
2006	11017600749.870213
2007	13528845756.3769
2008	16649292128.490171
2009	15234316493.103886
2010	14261666289.529951
2011	15557495223.811672
2012	14431484137.600283
2013	15217424208.520542
2014	15597826697.004171
2015	13393722631.505028
2016	13931477697.00143
2017	15123579396.925434
2018	17324472846.429123
2019	17613493374.237774
2020	17506965983.43304
2021	20328391386.205566