Year	current US$
1995	14000000
1996	16000000
1997	15000000
1998	10000000
1999	13000000
2000	19000000
2001	22000000
2002	26000000
2003	24000000
2004	32000000
2005	41000000
2006	54000000
2007	71000000
2008	83000000
2009	59000000
2010	70000000
2011	80000000
2012	92000000
2013	114000000
2014	126000000
2015	131000000
2016	146000000
2017	178000000
2018	217000000
2019	251000000
2020	44000000