Year	constant 2015 US$
1988	8116436602.235247
1989	7603899244.392773
1990	8116127946.168229
1991	7977463687.488851
1992	7593116682.440422
1993	7994679466.644922
1994	7132586904.1277275
1995	8687743692.448524
1996	9836383870.015469
1997	10178025263.089893
1998	10426081308.94964
1999	8716663512.613594
2000	13218953486.760597
2001	13135658970.237385
2002	13186506726.090815
2003	13584022807.041086
2004	13485398695.976719
2005	13651892070.757282
2006	14377981264.220247
2007	14537309715.708202
2008	15156112307.410843
2009	16093086880.283619
2010	16223861069.303665
2011	16087224407.003548
2012	15896209633.334555
2013	16841651408.140211
2014	17047627034.3347
2015	17567006871.620964
2016	18552397788.854134
2017	19551945297.58771
2018	20131205800.801315
2019	20142061048.102943
2020	19035814671.221256
2021	18795434855.466003
2022	18826807521.584446
2023	18679269509.834045