Year	constant 2015 US$
1995	1723.011617197376
1996	1680.106791864163
1997	1723.9435007723778
1998	1623.3253694693828
1999	1608.0588622260557
2000	1612.221783265274
2001	1642.1265120518883
2002	1839.8681784196579
2003	1807.2532594973356
2004	1999.9853305126926
2005	2099.0849407458913
2006	2306.3353370202185
2007	2622.207148303576
2008	2696.1146484780434
2009	2833.1183361616154
2010	3012.9245811070064
2011	3107.65887660225
2012	3255.3561124427183
2013	3368.5797870281526
2014	3503.5383208553208
2015	3627.288944669426
2016	3781.4357095698806
2017	3951.1380145610847
2018	4039.3074714048844
2019	4130.580294395064
2020	3994.341378456783
2021	4219.210880789901