Year	current US$
1994	12362970000
1995	18984250000
1996	26230262100
1997	42259400700
1998	27585830000
1999	17666590000
2001	15535170000
2002	13415560000
2003	20810040000
2004	12430170000
2005	16469570000
2006	24426270000
2007	32532160000
2008	41487090000
2009	67257980000
2010	70537337000
2011	66587417000
2012	84679610000
2013	54521440000
2014	50691345000
2015	38637825000
2016	45826351000
2017	53296460000
2018	32293780000
2019	37339010000
2020	29466330000
2021	21282600000
2022	25660020000