Year	constant 2015 US$
1995	3951.183681575405
1996	3905.938269552827
1997	3795.663548563603
1998	3440.7258637138316
1999	3239.5874445207437
2000	3459.3385392197256
2001	3687.4307455005246
2002	3801.922148378623
2003	4218.135466300281
2004	4715.853309884961
2005	4545.185287095113
2006	4573.877266840461
2007	4913.995679930886
2008	4913.4252103633
2009	5729.62484804918
2010	6039.838259682751
2011	6122.9332219724
2012	5701.194973290141
2013	6518.157041615252
2014	6787.945972200546
2015	6105.837687912554
2016	6573.72043835027
2017	6794.330931089565
2018	6469.263176439495
2019	6631.113615575056
2020	7317.446488630235
2021	7300.297605033245
2022	7559.87704373825