Year	current US$
1960	5.245855737052421
1961	5.208097049196788
1962	1.5984912187325069
1963	4.270884940176705
1964	4.146658795648615
1965	4.334734833142118
1966	4.221398187924466
1967	5.416024631428328
1968	4.578852029597022
1969	5.957228429343024
1970	5.49654235559981
1971	6.54685840510996
1972	5.87743512803616
1973	5.671348123434204
1974	8.232373180687192
1975	6.078100273182979
1976	7.970893769756819
1977	11.16241245274657
1978	10.214166073114345
1979	8.141587635020128
1980	9.880113519416566
1981	13.928497234466612
1982	22.200845975956508
1983	13.244493957213495
1984	11.870646714117546
1985	9.475327096776748
1986	14.543346644047253
1987	15.86766741045311
1988	16.79569718396327
1989	23.50372909962068
1990	14.367380649321897
1991	32.05857086167741
1992	16.852733771716704
1993	24.23052991615457
1994	20.094316672243906
1995	26.349301596573962
1996	15.277010595413627
1997	17.022639497769106
1998	12.32672434033723
1999	14.731306057508856
2000	15.650436215917523
2001	13.218738831690741
2002	12.482710313297218
2003	12.235548696176195
2004	6.378864934420558
2005	11.616106645407257
2006	12.465049504039442
2007	21.852743294155875
2008	24.808916090731017
2009	28.61164163097384
2010	19.47781912399948
2011	13.685975051576273
2012	17.653944812526486
2013	21.76449896095661
2014	10.248375876837127
2015	9.741095396559668
2016	14.128840038127011
2017	22.461199948893885
2018	25.5520127781246
2019	19.517532847226338
2020	46.04079973262524
2021	26.125484876507787
2022	14.263921661207545