Year	constant 2015 US$
1996	217046000
1997	217461000
1998	232513000
1999	250821000
2000	343142000
2001	308428000
2002	388639000
2003	411178000
2004	320751000
2005	376088000
2006	396982000
2007	415308000
2008	531643000
2009	462947000
2010	403502000
2011	319336000
2012	267296000
2013	193902000
2014	204670000
2015	238700000
2016	369304000