Year	current US$
1960	2.114285172056115
1961	5.440960798120109
1962	7.557210928184345
1963	6.970380660017946
1964	6.784821475773164
1965	11.032061299572389
1966	14.124150565082038
1967	14.99581546328822
1968	13.830126911008486
1969	13.229963179629095
1970	9.50677105118349
1971	15.633859803641926
1972	12.613443663829766
1973	12.266308603037254
1974	17.543427501689596
1975	23.417585836172524
1976	22.698368342114787
1977	28.32896064224569
1978	37.11652443854748
1979	47.2709441730015
1980	66.18019230481917
1981	71.32982982395177
1982	62.04653353981096
1983	69.38368255310517
1984	62.58314646177203
1985	57.01748707715533
1986	51.44014780964735
1987	61.71498710319852
1988	62.812440857893925
1989	76.11944970962786
1990	77.33754135377269
1991	67.40059631223131
1992	77.02957463281496
1993	75.87465754498011
1994	60.51369264706941
1995	58.24477776030814
1996	52.79019214610879
1997	46.38090432057195
1998	31.148662206030956
1999	15.880712669566297
2000	18.597738535369377
2001	27.782320259918738
2002	38.54752910338447
2003	39.70336485322248
2004	48.005825350961736
2005	34.610686651626715
2006	36.01311346806742
2007	59.123804374196666
2008	62.450687733465024
2009	55.256674099125554
2010	126.58527625697577
2011	126.01113376343355
2012	134.4515450614756
2013	154.61882602513091
2014	51.149221984355506
2015	40.82565047208383
2016	52.274575951747124
2017	67.1053454672607
2018	69.953960550276
2019	63.000348303907266
2020	75.80408815810657
2021	78.54639933491623
2022	66.47945671771839