Year	current US$
1990	-2169458742.05043
1991	-492729853.011483
1992	1383154636.35111
1993	4698533530.15275
1994	6360036034.20329
1995	6880507513.10932
1996	11672718340.0298
1997	11945186573.296
1998	7187288095.0784
1999	8083396957.13476
2000	8310028807.22807
2001	6452040328.62879
2002	8679010761.75047
2003	10642469863.587
2004	14417121385.3867
2005	16882277397.8785
2006	20929422786.818
2007	26889839247.9657
2008	31838873663.6296
2009	20341034997.3075
2010	28217559300.4106
2011	39543378940.2459
2012	32061867596.5302
2013	29791513165.7523
2014	22738827132.5623
2015	16860628121.6625
2016	16952009172.8763
2017	14331025944.9107
2018	3395218398.83567
2019	-733909768.168758
2020	501411281.947517
2021	1305491782.51089