Year	current US$
1989	4594.5599563486385
1990	2737.693779901301
1991	2373.406814799548
1992	2622.950123726534
1993	2905.0512851578583
1994	3299.2902866171266
1995	3562.77219341731
1996	3961.0851831845544
1997	4282.97873003498
1998	4289.246520549349
1999	4054.1194352457046
2000	4093.9324165536173
2001	3949.658006278437
2002	3723.276359867506
2003	3736.9117434777454
2004	4013.19692357254
2005	4466.821844964445
2006	5124.574524453469
2007	5958.562744340116
2008	6842.751050471915
2009	6963.992226587328
2010	7728.723096980654
2011	8573.522370166984
2012	9463.513802388628
2013	9910.83184047553
2014	9735.18130127699
2015	8893.26770757183
2016	8137.138646516587
2017	8004.239009500304
2018	8284.136661321065
2019	8350.946262680025
2020	7288.47294492728
2021	7707.9979476009
2022	8291.097730212974
2023	9028.38676358825