Year	current US$
2000	254.31530762
2001	261.96295166
2002	185.19685364
2003	192.35475159
2004	202.57089233
2005	210.62667847
2006	231.38442993
2007	269.94934082
2008	312.46572876
2009	342.55401611
2010	380.92901611
2011	312.84854126