Year	constant 2015 US$
1991	3322.094026194663
1992	3266.9004263169386
1993	3290.933266028015
1994	3467.2521665548757
1995	3620.9293244470928
1996	3783.8801493590277
1997	3672.3183950380185
1998	3910.9315491618067
1999	3897.7193985185204
2000	4016.0269211912378
2001	4000.556097003554
2002	4063.5685542199803
2003	4294.030581095565
2004	4275.861611110165
2005	4382.747800686559
2006	4619.904985856208
2007	4956.033936976312
2008	5172.069869870511
2009	4858.976052848992
2010	5287.1419914839125
2011	5470.634251526992
2012	5451.1190033527255
2013	5781.876920582784
2014	6005.246111437656
2015	6176.4316913146695
2016	6065.94064375446
2017	6399.167611580906
2018	6328.243129997295
2019	6582.684748034758
2020	6794.998172364198
2021	6741.48503715698
2022	6793.855239338883