Year	constant 2011 international $
1990	1358.18900719216
1991	1373.5145855811
1992	1419.82621161705
1993	1458.43043313581
1994	1489.50894600103
1995	1531.01147633199
1996	1559.27844253561
1997	1597.74498542039
1998	1645.96805905689
1999	1691.42994745971
2000	1749.6842262985
2001	1800.65035631101
2002	1852.06495285888
2003	1906.83469513434
2004	1981.65417147558
2005	2082.20764822257
2006	2217.81907441907
2007	2361.75570793823
2008	2501.2374221202
2009	2603.47420119596
2010	2723.22965500186
2011	2860.60944903764
2012	3025.12297239305
2013	3158.04265545929
2014	3270.0187662344
2015	3439.37887420025
2016	3620.06635268232
2017	3792.04488826644
2018	4057.25018119739