Year	current US$
1988	15235755019.998297
1989	15457712372.895119
1990	18245177609.71273
1991	20456190724.29196
1992	17383709365.241753
1993	17621706877.10645
1994	13312500699.542458
1995	14385622226.292688
1996	15310075951.995695
1997	15779352741.505758
1998	17929001277.902218
1999	18013647193.942554
2000	18332816167.781277
2001	19451814167.01555
2002	21040587345.38005
2003	24957508391.095646
2004	29305370360.850025
2005	32436403773.60114
2006	36837957601.420586
2007	45684827462.76014
2008	51830295254.350426
2009	51886586815.57605
2010	53983781437.084595
2011	64897696020.922615
2012	65007511665.85169
2013	72880091065.67775
2014	78440110720.98584
2015	76003503771.39711
2016	77172415204.91139
2017	81133644993.55296
2018	85354996297.38403
2019	89813491581.55305
2020	95628808447.0315
2021	102792543656.73354
2022	112665425417.09248
2023	126131679949.74211