Year	current US$
1978	102700000
1979	104200000
1980	126000000
1981	128400000
1982	96900000
1983	78700000
1984	62500000
1985	57300000
1986	38300000
1987	40300000
1988	52100000
1989	77800000
1990	94500000
1991	68700000
1997	111900000
1998	102400000
1999	106600000
2000	114250000
2001	143200000
2002	114400000
2003	141600000
2004	160700000
2005	483467860.36212397
2006	562284083.571158
2007	671525767.107646
2008	618541333.646143
2009	528549368.3844
2010	570852569.65278
2011	665404101.722232
2012	990095738.478017
2013	758019428.957016
2014	850866423.608197
2015	861512074.073592
2016	885102775.442813
2017	864940286.949804
2018	953204795.028419
2019	1011822349.75931
2020	555624813.639169
2021	525541832.298044
2022	938916417.685748