Year	constant 2015 US$
1991	533.3077428228569
1992	531.8634192037697
1993	530.4910261427208
1994	520.851466393114
1995	506.9557104696302
1996	511.69448876799623
1997	525.2713548030674
1998	536.2269981238137
1999	547.4812463001144
2000	578.3741816043927
2001	609.0338003607184
2002	628.7273987882065
2003	681.3641266693227
2004	723.7598623533338
2005	768.2862206758288
2006	792.3622114851715
2007	842.6172865868441
2008	879.3323496178198
2009	907.608359917575
2010	937.3795839522722
2011	979.8258537357751
2012	1010.8892616423664
2013	1038.149308492727
2014	1080.8205037263635
2015	1117.4532464012598
2016	1150.3232067570734
2017	1173.5148969266484
2018	1222.9124906912493
2019	1273.5968946057976
2020	1321.3795826274195
2021	1339.953907829582
2022	1380.4649094178753