Year	current US$
1995	8730000000
1996	10200000000
1997	12074000000
1998	12602000000
1999	14098000000
2000	16231000000
2001	17792000000
2002	20385000000
2003	17406000000
2004	25739000000
2005	29296000000
2006	33949000000
2007	37233000000
2008	40843000000
2009	39675000000
2010	45814000000
2011	48464000000
2012	50028000000
2013	51664000000
2014	44044000000
2015	44969000000
2016	44432000000
2017	38559000000
2018	40386000000
2019	35832000000
2020	14233000000