Year	current US$
1981	8347899.999999999
1982	10227800
1983	10254200
1984	12800915.52
1985	24718212.439999998
1986	23640208.6
1987	299568988.90000004
1988	89148976.86
1989	119327711.8
1990	108373544.2
1991	93086141.33
1992	574285386.3000001
1993	128742419.3
1994	136784522.2
1995	176103534.3
1996	132616165.20000002
1997	167671931.4
1998	176872186.1
1999	153537077.39999998
2000	195966391
2001	189306724
2002	201496972
2003	199841239
2004	183232041
2005	210491419
2006	250226489
2007	272305565
2008	325390649
2009	296161349
2010	270575069
2011	248215417
2012	227361036
2013	255209376
2014	273595483
2015	298986144
2016	334907399
2017	310880548
2018	308564818
2019	339047684
2020	270768871