Year	current US$
1990	1533.2742979019038
1991	1581.112312616835
1992	1680.548500095744
1993	1627.2628060233776
1994	1376.729021769636
1995	1433.0980413919906
1996	1468.7004469451506
1997	1586.4531724929689
1998	1666.5327888550898
1999	1681.1460537420971
2000	1847.299777826012
2001	1644.3535549028213
2002	1688.492422525293
2003	1934.1900534874724
2004	2548.657760961937
2005	3247.358391397032
2006	3853.7431608950574
2007	4577.438918590101
2008	5315.382115490728
2009	5336.68423171374
2010	5789.882512351381
2011	6229.815716770811
2012	6825.670011429307
2013	7416.179824437816
2014	7435.337371497905
2015	6980.286850864955
2016	6337.082025062867
2017	6116.247402157131
2018	6099.566141717859
2019	6054.340382372131
2020	5860.561757216504
2021	6408.686487709414
2022	6940.833766653324
2023	7691.872476801159