Year	constant 2015 US$
1993	17837934623.962723
1994	16646954193.784508
1995	16923638262.650162
1996	16093579042.738075
1997	15388398906.821041
1998	15694564404.15675
1999	14991636092.621492
2000	15145831671.885405
2001	14847642069.780767
2002	14279618433.774258
2003	17088775026.848341
2004	18057880912.292706
2005	19631032230.56025
2006	20277909764.2425
2007	21866236785.42758
2008	22460207012.842514
2009	23997138586.578423
2010	26883343309.837334
2011	28752531049.737305
2012	32905493882.357426
2013	35827088148.878204
2014	38269499936.80225
2015	39389404680.83909
2016	39441252113.72061
2017	44084651396.87182
2018	48286552233.35394
2019	47067035532.19356
2020	48711472758.208954
2021	58193047635.1599
2022	66020346761.99148
2023	94788406403.64725