Year	current US$
1987	210002599.414485
1988	236870733.692383
1989	240198887.960122
1990	273987488.436623
1991	283892670.659869
1992	316354446.245166
1993	438612125.387856
1994	360693091.421764
1995	430727892.568561
1996	440785349.464624
1997	431411897.788149
1998	457306821.053218
1999	519619796.914632
2000	465604161.952913
2001	489431967.936052
2002	532365424.003386
2003	703581114.042749
2004	798138739.393495
2005	822458330.976105
2006	928562468.708304
2007	1302293223.35534
2008	1509515388.51639
2009	1456021597.73365
2010	1385152924.46713
2011	1566212737.45505
2012	1471369159.99812
2013	1579428215.32034
2014	1565161655.98276
2015	1358100076.39743
2016	1417699655.37431
2017	1507460851.26001
2018	1697539499.88687
2019	1714070482.43379
2020	1461875786.01309
2021	1658457518.59295