Year	constant 2011 international $
1990	9841.94794398178
1991	10118.4569590045
1992	10842.0620131833
1993	11048.6520599268
1994	11766.4751201731
1995	11512.9565803063
1996	12068.6797311706
1997	13009.0035799447
1998	13510.5640050444
1999	13180.6448289943
2000	12880.6170403235
2001	12364.1023638534
2002	11406.1643029011
2003	11506.2220915129
2004	12089.9853912731
2005	12990.6353422698
2006	13508.4349647175
2007	14364.6693723971
2008	15356.4503129098
2009	15962.914946307
2010	17159.3937728551
2011	17993.4475358742
2012	18574.7319843598
2013	19376.1326543846
2014	19939.0050053953
2015	19945.0346807274
2016	20210.2576826934
2017	20658.4744393954
2018	20916.1501832149