Year	constant 2011 international $
1990	4947.18541105746
1991	4901.94545291609
1992	4872.64345240848
1993	4937.39115516841
1994	4990.68098878986
1995	5115.10676501507
1996	5306.65614842544
1997	5493.76879291906
1998	5534.52646060828
1999	5676.27216115792
2000	5928.91359998217
2001	6074.11012697438
2002	6271.96483559629
2003	6563.20862138255
2004	6996.64485348362
2005	7411.39353698076
2006	7928.15456156282
2007	8522.25974750924
2008	8903.24569802269
2009	9040.53830246801
2010	9615.03513124288
2011	10082.6966796275
2012	10499.3786413734
2013	10925.8034026223
2014	11319.5457168246
2015	11691.2918025726
2016	12145.367894901
2017	12647.8866467699
2018	13156.9053343031