Year	constant 2015 US$
1989	8105.89501953125
1990	7849.51904296875
1991	7432.021484375
1992	6345.912109375
1993	5798.91455078125
1994	5071.74267578125
1995	4862.646484375
1996	4686.86279296875
1997	4760.33935546875
1998	4515.50927734375
1999	4819.38037109375
2000	5323.66650390625
2001	5618.95556640625
2002	5910.171875
2003	6370.45361328125
2004	6856.67822265625
2005	7323.38525390625
2006	7949.89697265625
2007	8640.40625
2008	9093.7001953125
2009	8381.8681640625
2010	8755.1201171875
2011	9120.8203125
2012	9464.0107421875
2013	9601.537109375
2014	9493.8125
2015	9277.7138671875
2016	9269.3193359375
2017	9418.9140625
2018	9674.787109375
2019	9882.0244140625
2020	9632.3251953125
2021	10206.9453125
2022	10030.0390625
2023	10420.5712890625