Year	constant 2010 US$
1990	3229.62201845071
1991	3063.43120564861
1992	3031.02309552247
1993	2764.55336141008
1994	2144.40906730407
1995	1710.31373843422
1996	1655.4685993905
1997	1741.59082089393
1998	1764.33378689455
1999	1890.12206879316
2000	1924.8394007888
2001	2097.58217906851
2002	2151.26516810737
2003	2396.17735798336
2004	2708.06462771653
2005	2970.81113102308
2006	3308.74006257304
2007	3624.89477945636
2008	3829.14479609063
2009	3754.6405254454
2010	4116.23130328949
2011	4540.59643950639
2012	4936.82778704482
2013	5370.31665080667
2014	5370.85855546341
2015	5388.15845666318
2016	5376.73961831742
2017	5383.65209195634