Year	constant 2011 international $
1997	8107.34589968647
1998	8303.58897953527
1999	7297.97643049599
2000	7937.83080152956
2001	8352.753117645
2002	8913.72441384256
2003	9307.12766738581
2004	10150.80862779
2005	10713.8998080472
2006	11784.0836883308
2007	12505.547795954
2008	13173.2074657746
2009	13006.2350793313
2010	13082.8905103598
2011	13452.5987494765
2012	13281.527889407
2013	13634.3833623365
2014	13488.4223914073
2015	13677.3888609912
2016	14077.8551731731
2017	14280.0283912347
2018	15217.7095354309