Year	constant 2015 US$
1991	726.4063143783764
1992	719.6598081548149
1993	751.3475917878233
1994	709.8168076935692
1995	704.5267267133016
1996	721.837649304561
1997	732.3960676167311
1998	741.0274347629487
1999	740.8117294638503
2000	770.1045386702941
2001	795.108247992929
2002	809.345378132228
2003	830.4932786501656
2004	824.4770133046688
2005	863.2602929371661
2006	909.4887077630359
2007	919.2585728882785
2008	962.320523553306
2009	992.8194034192526
2010	1011.5623572758706
2011	1024.3154450966163
2012	1043.1276380308361
2013	1053.1832192223842
2014	1070.6306122819979
2015	1084.2752574993265
2016	1101.87309806812
2017	1131.191538186605
2018	1146.1484119002719
2019	1118.023266000898
2020	1134.7496322915629
2021	1132.1528144047973
2022	1120.995704913332