Year	constant 2015 US$
1990	65281473163.29877
1991	36622906446.63615
1992	35670710877.99402
1993	13804565110.355564
1994	18387680726.557312
1995	10591304098.757977
1996	7456278085.134168
1997	7873829658.423611
1998	7653362427.816491
1999	8395738582.916108
2000	9294082611.164785
2001	13058186069.073895
2002	14494586536.621054
2003	15422240075.560127
2004	17750998326.1654
2005	23963847740.782017
2006	31560387474.609917
2007	38945518143.89698
2008	33960491821.315063
2009	34741583133.618164
2010	35436414795.352684
2011	37349981194.66667
2012	42093428806.37405
2013	44913688536.58868
2014	48776265750.61501
2015	51458960366.60322
2016	52745434375.89572
2017	54380542842.13056
2018	55957578584.28323
2019	62784403172.038795
2020	62156559140.67519
2021	63088907527.62732
2022	64161418956.09241