Year	current US$
1994	4896230000
1995	9507990000
1996	14435180000
1997	13688600000
1998	13533930000
2002	4038650000
2005	25186410000
2006	37745770000
2007	95601030000
2008	57994450000
2009	40774750000
2010	60652210000
2011	48414500000
2013	92428750000
2014	74476710000
2015	62466910000
2019	61985110000
2020	73147850000