Year	constant 2015 US$
1991	685.376907530648
1992	681.7947276935731
1993	714.6522268493794
1994	672.8808249533332
1995	665.1084681216145
1996	683.7845748483815
1997	695.7981968527158
1998	707.5129660064931
1999	706.8951801141865
2000	674.474495606874
2001	695.0563787611702
2002	712.381823832801
2003	735.7869697077989
2004	733.2974030429485
2005	767.8308250652568
2006	792.8956187080921
2007	812.5319899935399
2008	836.2355529142524
2009	859.6872877746807
2010	883.9264142108981
2011	883.3115803088959
2012	921.7091519968884
2013	932.963488736461
2014	964.4183205302068
2015	973.9708347241608
2016	994.908632108489
2017	1017.5691102203511
2018	1027.0968360018398
2019	997.8152461403292
2020	1008.815780919478
2021	1008.5102367759356
2022	1015.7932343415237