Year	current US$
1998	10000000
1999	13000000
2000	13000000
2001	14000000
2002	19000000
2003	27000000
2004	26000000
2005	38000000
2006	51000000
2007	80000000
2008	88000000
2009	79000000
2010	73000000
2011	87000000
2012	71000000
2013	67000000
2014	48000000
2015	42000000
2016	45000000
2017	54000000
2018	51000000
2019	52000000
2020	12000000