Year	base year varies by country
1960	0.928434133086789
1961	0.9865307279347396
1962	0.9867499695499105
1963	1.0377063203751338
1964	0.9469773258459453
1965	1.022088773337838
1966	1.0864414125589812
1967	1.2471474292271318
1968	1.175192205941583
1969	1.314190600179436
1970	1.3208970337286277
1971	1.3600385802297579
1972	1.4199077458064417
1973	2.2918132189246725
1974	3.312649092858116
1975	5.981642397487072
1976	4.9270537622265165
1977	4.76888765377612
1978	5.990623525580779
1979	6.743315777288025
1980	7.927109386087607
1981	8.711472310526496
1982	9.570058684248792
1983	10.382341902784658
1984	11.200010127927442
1985	13.271464959460195
1986	14.366945412615314
1987	15.964496752693439
1988	17.161169135285725
1989	18.592062827148286
1990	19.806633077015647
1991	20.347261464062438
1992	20.872660697262635
1993	20.90512147777789
1994	21.73426381661715
1995	23.287163643950553
1996	27.745075008245124
1997	28.799452282875958
1998	30.163455559638848
1999	31.30394719702645
2000	32.38288761974511
2001	33.43894544046327
2002	34.74067925813509
2003	36.76113346602194
2004	38.43822650946305
2005	40.20114222633718
2006	42.563335538885525
2007	45.31771969098141
2008	48.88013027043742
2009	52.186555650424935
2010	55.91510919762407
2011	60.3097297242588
2012	65.23376204154096
2013	69.91425409017467
2014	73.87754530347503
2015	78.21620882252904
2016	100
2017	105.04759758203714
2018	111.14617658351251
2019	115.21205660630578
2020	119.63742472873022
2021	124.56789201651239
2022	130.85735213842506
2023	139.88274603091688