Year	current US$
1968	5461268430.311262
1969	5790817171.83143
1970	6689520540.14282
1971	7365892842.554965
1972	8762562036.358646
1973	9860917976.251308
1974	11798723501.123762
1975	13426367491.123512
1976	15522701015.192518
1977	16969259898.780655
1978	19515462266.32331
1979	20222094274.778004
1980	23274460938.54674
1981	25650518987.010094
1982	28177643944.916542
1983	29772214379.476147
1984	32810073973.615654
1985	34867277114.2405
1986	38243316176.90325
1987	41683817300.013794
1988	45476746568.80664
1989	51364510631.64673
1990	67313539459.61208
1991	57180816931.72634
1992	41459400321.08836
1993	43162408751.63766
1994	49776034083.2952
1995	48844647843.20036
1996	51107759575.969574
1997	52042210295.98113
1998	56013040265.694756
1999	55990458183.666
2000	56062233196.2338
2001	58094073615.34685
2002	58393200897.4264
2003	61889369754.16957
2004	65334613369.23712
2005	70501087721.29796
2006	80601015847.82228
2007	93869151934.80833
2008	107701339533.32253
2009	112498860017.75479
2010	122956513976.69391
2011	131798288661.35509
2012	130643459663.8338
2013	137153727676.79283
2014	145790812729.81558
2015	144348745874.11615
2016	137031955683.78598
2017	129356570699.19725
2018	134550167028.50626
2019	141662263773.30292
2020	144872260739.48227
2021	146285650189.29572
2022	152415498644.18134
2023	162432649526.48242