Year	current US$
1992	214474287.08572423
1993	334544480.99135625
1994	440568181.8181818
1995	479375000
1996	606037723.976277
1997	589008180.669176
1998	597112441.981926
1999	597463420.7132837
2000	411183688.3116883
2001	460870323.3366214
2002	472665962.37306917
2003	587987562.3752917
2004	663164475.0679964
2005	603478012.016853
2006	464617886.1788618
2007	379414634.14634144
2008	360673606.50406504
2009	435274751.2195122
2010	494229450.4065041
2011	603784852.0325203