Year	current US$
1990	2452.857601867867
1991	2260.9884597225823
1992	2328.9523989968734
1993	2452.0351510555474
1994	2799.6382675648483
1995	3580.94831587853
1996	3796.496074553028
1997	3748.50859502598
1998	4109.312867543244
1999	3989.197636688752
2000	3952.108475647621
2001	4352.721426831339
2002	4937.131709618716
2003	5949.814253107342
2004	7176.508383779898
2005	8355.869210017361
2006	9469.733566839617
2007	12009.686500140968
2008	14578.014129716308
2009	12307.707503491558
2010	12608.02304474313
2011	13964.44288651327
2012	13075.949185465799
2013	13667.981381082574
2014	14143.7397479462
2015	12528.08264308758
2016	12785.385923363265
2017	14225.877324754456
2018	16081.911063853575
2019	16355.858149338344
2020	16302.754624646546
2021	18816.133690429295
2022	19414.74165943878
2023	22494.480663756414