Year	current US$
1994	4294296508.947032
1995	4546145210.453774
1996	4876183213.798827
1997	5183112911.590691
1998	5429437983.726931
1999	6058426435.097761
2000	6150327804.23197
2001	6378778236.451064
2002	6270141432.711401
2003	6418397183.639421
2004	7000600576.010842
2005	7766580023.067775
2006	8439385315.879339
2007	9420169661.490095
2008	10863622050.495821
2009	9878020600.309742
2010	10460424041.505123
2011	11904496461.428005
2012	12663600419.591705
2013	13240531007.81465
2014	13862297709.070877
2015	15056352910.099499
2016	15418468956.360716
2017	15674904911.33377
2018	14253546391.491196
2019	13262030632.485653
2020	13330693230.757584
2021	16047937221.005943
2022	18098449033.293938
2023	20195328364.598312