Year	constant 2015 US$
1991	753.4750579875466
1992	715.024655710472
1993	743.936773398192
1994	719.3308003423306
1995	708.0690447592411
1996	766.3323498196656
1997	775.4828764021912
1998	763.7482347649228
1999	775.442299684903
2000	749.7888292954572
2001	768.0704051136304
2002	763.1763969493636
2003	754.9242740136195
2004	749.1184861435169
2005	764.6395761035025
2006	788.9173881450755
2007	792.1576508109557
2008	796.139858234387
2009	804.7269235772798
2010	832.5647532218105
2011	844.632283816424
2012	840.2962659220069
2013	847.1828909039855
2014	874.950512815079
2015	885.5405589416416
2016	896.2561702011444
2017	914.2085550888005
2018	916.089091764239
2019	915.4030135206699
2020	929.8648647288579
2021	945.3753810386586
2022	944.6544754593185