Year	current US$
1960	275.58533876153433
1961	322.7971230622242
1962	347.68453738064807
1963	290.0536321522334
1964	399.53291840411123
1965	413.6252217284057
1966	442.37636711825144
1967	481.08852030858196
1968	513.3593397708056
1969	544.1489314209568
1970	542.2083274933775
1971	626.031580848688
1972	691.8141868395611
1973	1137.7213189858053
1974	2379.663506030911
1975	3252.6199837825848
1976	4434.341163864912
1977	4042.630231233283
1978	3355.374011481188
1979	4149.960174773601
1980	5713.2073592488905
1981	5023.083662635351
1982	4582.163847001938
1983	4181.092459280521
1984	4273.312832001066
1985	3899.573788157508
1986	3866.27688075118
1987	3626.2309650326147
1988	4121.065808059123
1989	4376.761184536427
1990	6055.0602473660665
1991	5349.45201171297
1992	5390.53678687714
1993	4109.898798578633
1994	3832.0932618842985
1995	4419.790339126551
1996	4948.752871671959
1997	4514.994087617681
1998	3705.818088652071
1999	3758.1619358776497
2000	3991.157151410029
2001	3844.5613492084735
2002	3976.646796205868
2003	4724.254798306103
2004	5483.1445746716445
2005	6570.963265309191
2006	6873.453982710207
2007	8036.919955643272
2008	9732.22653332604
2009	7325.909513185449
2010	8399.597348081212
2011	10273.798444897953
2012	9348.514876400557
2013	9250.081114620361
2014	9255.368034676349
2015	7090.454633949424
2016	6722.198222690595
2017	6975.695191914025
2018	7694.906045163249
2019	7523.862278459802
2020	6680.082670353832
2021	8635.79714374956
2022	8820.347338099984
2023	8420.102057018272