Year	current US$
1960	0.7264901827369548
1961	0.6627339087025774
1962	0.6616569582475081
1963	0.4332682193078021
1964	0.9204538977814195
1965	1.508438504080702
1966	1.3398589575088238
1967	1.3971337581788754
1968	1.2929872051546774
1969	1.5656516992563865
1970	1.9352424915242175
1971	1.8844915025875648
1972	1.4267582913651522
1973	1.2814264866572427
1974	1.1872540392243094
1975	1.29480188501742
1976	0.8014437075080629
1977	0.630878750183241
1978	0.5849926462257019
1979	0.36381467250902816
1980	0.47154657944278383
1981	0.5221123770204202
1982	0.4516200251253143
1983	0.5891501651901451
1984	0.39821703745683623
1985	0.3793731394606053
1986	0.6773562260615237
1987	0.768023478331193
1988	1.306896343266402
1989	3.7091322631710426
1990	2.6790105795926653
1991	2.644408612756497
1992	2.583496946226432
1993	2.806311928899898
1994	1.7984731646075718
1995	1.9499460863759444
1996	1.7011219645145867
1997	1.7561993344448281
1998	1.7425578713676646
1999	1.2698048210321242
2000	1.4147105923153673
2001	1.3302928640501712
2002	2.311645259719193
2003	2.327602684017805
2004	4.232109967401779
2005	45.5673509818143
2006	79.20722409646218
2007	11.0807561376477
2008	6.304398174655174
2009	7.428617824133525
2010	12.751312382278057
2011	10.938106020455177
2012	11.2662030589464
2013	14.397732113070349
2014	13.817670276752159
2015	13.215194245142627
2016	13.241270890266668
2017	17.34584544807064
2018	16.650585200727214
2019	16.11085854467682
2020	16.20458963342763
2021	16.530825121322607
2022	20.33145018718483