Year	current US$
1976	113783973.23166241
1977	160163496.0321554
1978	223232129.7736476
1979	329114740.3184706
1980	444306661.49582356
1981	426743112.4922611
1982	386355522.8658589
1983	328955787.0577678
1984	397096866.8338479
1985	400533157.3312037
1986	398137608.303112
1987	406491922.84166414
1988	493281809.511124
1989	594081189.959715
1990	554490090.715862
1991	555160470.056349
1992	644371066.924035
1993	781586577.152017
1994	856647391.790737
1995	1192179483.839198
1996	1080483926.683148
1997	1187667471.4068325
1998	1166392804.830589
1999	1334637552.901016
2000	1550842739.3785715
2001	1440041534.774758
2002	1322643909.2929258
2003	1600457419.491801
2004	1854898673.24331
2005	2169207247.6867933
2006	2309042771.3992004
2007	2872101057.529728
2008	3587775219.9197907
2009	3183652519.149467
2010	4121921570.595835
2011	4977722579.6072445
2012	5229958471.62916
2013	6193947323.836829
2014	7402334237.824663
2015	7391614349.5044775
2016	7600059825.410465
2017	8275137883.695646
2018	9271706691.259989
2019	9333944067.848207
2020	7574219065.398093
2021	10479471319.938269
2022	11786316702.821024
2023	10723572630.556152