Year	constant 2011 international $
1990	3089.44164648539
1991	3009.38789050777
1992	2610.41508855261
1993	2493.07287333905
1994	2317.48888286654
1995	2255.50681106395
1996	2250.39319602527
1997	2323.20031432504
1998	2384.41057162751
1999	2460.27724906393
2000	2519.52273587905
2001	2591.4165301366
2002	2661.61237000963
2003	2742.17213916774
2004	2912.63684072011
2005	3079.03617051166
2006	3268.34287710629
2007	3527.38268898131
2008	3784.62977044614
2009	4020.90576657839
2010	4240.43426776429
2011	4469.99748445762
2012	4764.96822484892
2013	5067.63394690021
2014	5340.60426716629
2015	5639.17299211529
2016	5879.70918732194
2017	6039.50381299098
2018	6240.30547240003