Year	constant 2011 international $
1990	7855.22273794727
1991	8417.38391910905
1992	8920.93961519736
1993	9215.7897240116
1994	9285.86958485528
1995	9256.94123910538
1996	9439.50290045522
1997	9846.48586137683
1998	10357.4097538621
1999	10549.8386186658
2000	10624.8530408621
2001	10480.7042964496
2002	10511.7647014066
2003	10749.5090708011
2004	11344.889913774
2005	11938.4905663825
2006	12736.4519727985
2007	14006.705348673
2008	15113.5265487258
2009	15032.0102303319
2010	15630.8617965347
2011	17099.8188262158
2012	18452.6687005231
2013	19393.1590224858
2014	20031.6934361289
2015	20821.5619113913
2016	21484.3150995395
2017	22243.5494820482
2018	22674.3990441347