Year	current US$
1960	448.11479741438416
1961	369.11467347933905
1962	310.44494167483674
1963	362.3803804860639
1964	432.9584364163455
1965	447.2344793704857
1966	442.0331668058352
1967	451.28912992850513
1968	443.242230825046
1969	518.9505629835895
1970	463.77242837515917
1971	433.6708481496331
1972	487.6287894073944
1973	579.0919066254954
1974	954.874778545272
1975	1088.081525685142
1976	1244.7270838473698
1977	1468.8736766745387
1978	1545.8231296000756
1979	1789.2305199592668
1980	2197.867368718078
1981	2611.253278167742
1982	2324.8291209924687
1983	1950.059651441134
1984	1874.3819631914248
1985	1853.0918631705802
1986	1613.6968975159202
1987	1433.332092362931
1988	1309.1433690873691
1989	1360.4869749719992
1990	1458.3263462942962
1991	1589.7521735707835
1992	1657.8587203979841
1993	1701.1594589910023
1994	2001.178158853332
1995	2113.2636522054017
1996	2142.3286405069
1997	2349.218685347037
1998	2293.6558279355254
1999	1582.7586069466836
2000	1389.0979292502418
2001	1800.3983645350002
2002	2069.849767520396
2003	2328.0038829625996
2004	2600.369807943246
2005	2925.1135728857753
2006	3261.514958068924
2007	3497.7057340335473
2008	4217.444584483042
2009	4076.234948041636
2010	4546.5787745291145
2011	5183.623700331178
2012	5666.217446876859
2013	6141.983181442154
2014	6436.761036506217
2015	6002.108311102401
2016	5941.234708783707
2017	6256.683019359711
2018	6316.46884119534
2019	6203.727050797579
2020	5450.433761195821
2021	6036.447274167496
2022	6476.644575301372
2023	6533.35150400616