Year	constant 2011 international $
1990	2644.33463395624
1991	2584.77835535929
1992	2511.22116268673
1993	2426.86416536488
1994	2386.53900867497
1995	2401.25282247258
1996	2460.83858758503
1997	2484.02140368988
1998	2480.55529952408
1999	2470.66063941913
2000	2490.76952762621
2001	2535.30802463969
2002	2628.97916690787
2003	2673.89527688621
2004	2777.91077842279
2005	2874.67880146521
2006	2972.28096520449
2007	3086.4476922852
2008	3169.90456535566
2009	3193.5373864691
2010	3289.68182618033
2011	3349.32826817332
2012	3391.67653939398
2013	3475.80022921852
2014	3550.25996715271
2015	3562.63209238822
2016	3521.77854978065
2017	3526.97376738186
2018	3527.72030009313