Year	constant 2015 US$
1991	851.0744992376519
1992	817.898546058252
1993	841.4143340071672
1994	825.0007923426975
1995	817.3998347310163
1996	861.8713312344511
1997	871.4097529009294
1998	873.8914326153204
1999	893.9604323022521
2000	874.4458460475652
2001	891.8318469987398
2002	1003.9814835117936
2003	1022.7745815125135
2004	1025.737297529026
2005	1064.2745456560547
2006	1113.2581964183214
2007	1139.9592656022714
2008	1188.821800924265
2009	1215.393440510283
2010	1270.231057995734
2011	1280.0250282373001
2012	1316.5419114320264
2013	1329.0276591282868
2014	1381.2908694243442
2015	1408.435469159576
2016	1432.744221097238
2017	1468.3143867615981
2018	1480.4634647335836
2019	1480.4872191592024
2020	1494.207776704484
2021	1506.948089313878
2022	1508.3006940509515