Year	current US$
1995	96000000
1996	147000000
1997	127000000
2000	100000000
2001	81000000
2002	65000000
2003	67000000
2004	73000000
2005	79000000
2006	92000000
2007	115000000
2008	108000000
2009	106000000
2010	130000000
2011	153000000
2012	165000000
2013	192000000
2014	248000000
2015	226000000
2016	224000000
2017	226000000
2018	219000000
2019	214000000
2020	71000000