Year	current US$
1998	16000000
1999	18000000
2000	19000000
2001	22000000
2002	27000000
2003	39000000
2004	45000000
2005	36000000
2006	40000000
2007	61000000
2008	64000000
2009	54000000
2010	53000000
2011	54000000
2012	57000000
2013	65000000
2014	78000000
2015	72000000
2016	65000000
2017	97000000
2018	105000000
2019	108000000
2020	51000000