Year	current US$
1989	2324.622468829843
1990	2495.7553878004996
1991	2645.2863655030073
1992	2835.4409295968067
1993	3296.599529564357
1994	3784.836982079023
1995	4025.6268425225917
1996	4285.1440522944
1997	4623.323894321182
1998	4607.90787538169
1999	4101.964350112172
2000	4462.413346581285
2001	4315.698109541414
2002	3828.1678313002126
2003	3850.3497979436015
2004	4371.977916609615
2005	5212.205639855137
2006	6027.028127816763
2007	7013.377666169518
2008	8054.818352559884
2009	7474.825404252962
2010	9162.440266141743
2011	10305.953267155135
2012	10311.606888282908
2013	10453.321938633253
2014	10540.990625200733
2015	8719.62575346093
2016	8417.372109208902
2017	9256.11626423804
2018	8978.115902465757
2019	8771.144538443812
2020	7386.135056969242
2021	8516.309600503759
2022	9618.707431986459
2023	10681.733093561477