Year	current US$
1987	2714285714.2857146
1988	3210526315.7894735
1989	2363157894.736842
1990	3504761904.761905
1991	-6169230769.230769
1992	-1802643171.8061676
1993	390950146.10820866
1994	5405352878.776634
1995	5106025801.236556
1996	5154501989.375059
1997	6605940618.523918
1998	6378744883.73745
1999	5320738652.182986
2000	4743914461.016651
2001	4411682582.230413
2002	4621312744.936991
2003	5086928018.290213
2004	6028764805.414552
2005	10312935571.812675
2006	13867326732.673267
2007	17017227722.772278
2008	23519043533.582508
2009	14999409593.33816
2010	16181431640.224562
2011	22877509722.86005
2012	24645011299.54603
2013	23307018641.311146
2014	17178586514.511774
2015	13694718965.673042
2016	14172997777.728552
2017	17457904215.297245
2018	19941036360.66583
2019	21495737628.575615
2020	22082925716.768353
2021	28077317796.193523
2022	18951093833.70423
2023	22186669689.284664