Year	constant 2011 international $
1990	1027.39665998435
1991	1054.31550934577
1992	1042.36716865702
1993	958.362409348117
1994	905.890282550731
1995	821.872598059189
1996	747.006062825455
1997	727.681594145987
1998	754.429747911998
1999	737.090825634833
2000	717.973021535117
2001	716.263594456508
2002	728.185979798559
2003	697.929245628168
2004	708.83372030714
2005	692.569818912491
2006	706.746700906096
2007	707.48869579253
2008	717.792711796647
2009	721.063140329375
2010	733.727722815265
2011	739.219254973908
2012	748.075520582737
2013	760.699069642062
2014	768.469836927654
2015	715.54988614254
2016	689.014891669999
2017	670.777072479443
2018	660.265637135776