Year	current US$
1987	23510000
1988	34000000
1989	33810000
1990	61160000
1991	57480000
1992	76800000
1993	111560000
1994	140220000
1995	115990000
1996	159150000
1997	185610000
1998	182710000
1999	317490000
2000	212070000
2001	264649999.99999997
2002	278780000
2003	365910000
2004	423320000
2005	752320000
2006	455250000
2007	696110000
2008	802340000
2009	816040000
2010	1173790000
2011	1324590000
2012	1597450000
2013	1755380000
2014	1856730000
2015	1915390000
2016	2246160000
2017	2201350000
2018	2423370000
2019	2517130000
2020	2292780000
2021	2997850000
2022	2906260000