Year	current US$
1992	8458950000
1993	8805240000
1994	8846870000
1995	12990450000
1996	19268762100
1997	33276300700
1998	20299530000
1999	13318040000
2000	19433100000
2001	11772970000
2002	10059590000
2003	16915240000
2004	7621590000
2005	10109310000
2006	14826330000
2007	14869640000
2008	23098260000
2009	34403520000
2010	25405197000
2011	38197920000
2012	58797460000
2013	44965110000
2014	36712310000
2015	25598605000
2016	37097601000
2017	32072910000
2018	22223260000
2019	26634900000
2020	12788270000
2021	9410100000
2022	13274760000