Year	constant 2015 US$
1995	3976.0439395525405
1996	4367.203726853058
1997	5460.380271021918
1998	7544.9632802017795
1999	7266.4121431587755
2000	11304.911850267492
2001	9216.084663448395
2002	10073.114614687644
2003	11557.135616991116
2004	14280.965565245306
2005	13681.811183624775
2006	14282.118244120258
2007	19035.005476984577
2008	23799.965202743748
2009	20576.023889148346
2010	22635.168114042932
2011	22078.77914065033
2012	21597.474032796676
2013	21422.617576635042
2014	26406.205068939824
2015	26110.491014941013
2016	19870.088510778463
2017	22895.22039288155
2018	21738.66962422117
2019	27512.626456142276
2020	31339.09931756625
2021	27756.38332543605
2022	20782.52767441814