Year	constant 2010 US$
1994	367.817925545133
1995	351.007587694026
1996	365.707290630385
1997	334.965370462467
1998	323.843296647398
1999	292.260183572893
2000	285.150046842765
2001	263.196776850683
2002	267.776569664159
2003	276.241184607298
2004	284.339091056992
2005	288.545383089447
2006	297.290461317476
2007	303.551050014589
2008	303.552443621418
2009	309.596201870597
2010	319.914909020573
2011	326.711980210457
2012	335.481369919022
2013	337.440138595839
2014	359.188712134038
2015	377.746626780366
2016	400.527411302595
2017	397.014905254629
2018	403.490108718772