Year	constant 2015 US$
1991	1067.3474937191736
1992	1003.3638551571725
1993	928.3730097308779
1994	959.3117092432844
1995	912.8554850307994
1996	873.2697036914947
1997	941.7567389884713
1998	894.5567975453786
1999	1140.5349963611297
2000	1205.2192814792195
2001	1285.8032487401415
2002	1026.2236646485903
2003	1205.9673198115559
2004	1268.3420167926654
2005	1196.8381954406232
2006	979.3916220445004
2007	922.3444172757015
2008	1180.7359170019217
2009	1330.077609182904
2010	1460.4681583922174
2011	1025.984524165141
2012	1075.3477878348772
2013	1015.1326083436469
2014	851.1661158841359
2015	858.6349738711161
2016	826.8205288885853
2017	767.2081551727191
2018	772.4832627297488
2019	762.0345689129202
2020	831.9152015142591
2021	916.5483811067289
2022	924.8123462303109