Year	constant 2015 US$
2008	1577125061.782118
2009	1246510525.265088
2010	1175087443.5737257
2011	1260730505.3303366
2012	589805991.3426979
2013	693870390.9111081
2014	676523631.1383303
2015	689964291.6597303