Year	constant 2011 international $
1990	4458.24687575955
1991	3229.24994704174
1992	3015.39121547947
1993	3323.86420990755
1994	3622.00690719388
1995	4129.97511841441
1996	4533.89411426246
1997	4064.13258549467
1998	4450.92228471644
1999	5056.56624364276
2000	5442.57775526224
2001	5949.34291674597
2002	6238.11938946609
2003	6607.76727300569
2004	7001.0537061853
2005	7426.11504463375
2006	7914.03542850974
2007	8450.91778238222
2008	9154.71325757909
2009	9525.37069503098
2010	9927.62958299789
2011	10207.751719347
2012	10369.5605566625
2013	10492.6684652658
2014	10700.5209158145
2015	10971.0443950183
2016	11356.7170068473
2017	11803.2818022565
2018	12306.2600401264