Year	constant 2010 US$
1990	27726554254.3418
1991	27421562802.8775
1992	18098230082.3271
1993	14044228110.659
1994	13875697475.1679
1995	10823043893.0136
1996	11667240018.5934
1997	15622434908.9604
1998	14325773008.9115
1999	15328576443.4903
2000	17275306583.1388
2001	19536992524.5948
2002	21179198598.8927
2003	22999066819.5525
2004	26104063577.2041
2005	25399259083.0246
2006	27475004680.6068
2007	29013763475.8025
2008	29623080304.3094
2009	27302929539.1678
2010	29396844578.7177
2011	38333516684.0005
2012	42626865784.8568
2013	36403343025.387
2014	38065541024.9464
2015	38878164212.2127
2016	39888980586.9305
2017	42862890746.0701
2018	44371692574.2638