Year	base year varies by country
1960	0.8912769502709316
1961	0.968480934056855
1962	0.9686582448670772
1963	0.950473462264066
1964	0.9760481373696573
1965	0.956019885329979
1966	0.9724040476915065
1967	0.9957496129296041
1968	1.0124666641853783
1969	1.0106455740812055
1970	1.1654326249010982
1971	1.0579895508235202
1972	1.0707409260148788
1973	1.1799976327793817
1974	1.3693786649082182
1975	1.5314461173911467
1976	1.8209839523328817
1977	2.1287269737822077
1978	2.1943129570808995
1979	2.318042454371075
1980	2.539432199513235
1981	2.815038738292738
1982	3.1413736171489965
1983	3.5132506035855706
1984	3.8712761346337006
1985	4.192815917936354
1986	4.558082451390727
1987	4.804307881356583
1988	5.114455947376566
1989	5.614087628230039
1990	6.211269286499301
1991	6.989663186752761
1992	8.310516200758228
1993	10.446192844726896
1994	12.223760348662093
1995	13.595397157023406
1996	19.303937731251153
1997	21.51138477138137
1998	23.00242546953989
1999	23.967133173538848
2000	25.424298557704063
2001	25.824253358691784
2002	26.065246725803636
2003	27.680591711922474
2004	29.653343624732575
2005	31.106253592787258
2006	38.42559651256747
2007	41.549399846285134
2008	47.84462211359687
2009	61.096059246526416
2010	62.09754563465282
2011	68.34767165511315
2012	74.85640143406997
2013	80.34903647513158
2014	86.48371104254772
2015	94.47364246364496
2016	100
2017	107.58193402820181
2018	112.11654311645658
2019	116.90978795575535
2020	122.695481308957
2021	128.0091128702157
2022	135.70087853121137
2023	144.66976395948177