Year	current US$
1995	25000000
1996	29000000
1997	29000000
1998	31000000
1999	33000000
2000	33000000
2001	32000000
2002	34000000
2003	36000000
2004	37000000
2005	39000000
2006	39000000
2007	42000000
2008	45000000
2009	47000000
2010	48000000
2011	48000000
2012	45000000
2013	46000000
2014	45000000
2015	46000000
2016	51000000
2017	54000000
2018	55000000
2019	61000000
2020	19000000