Year	base year varies by country
1960	2.3177132065130447E-05
1961	2.4699633604172623E-05
1962	2.7897869719510526E-05
1963	4.0122835451697704E-05
1964	5.935546067386464E-05
1965	8.24091782097001E-05
1966	0.00010596284277072224
1967	0.00013260708041835817
1968	0.00017698890676495204
1969	0.0002480685942927851
1970	0.00034872437606329885
1971	0.0004103498027697196
1972	0.0007697951531363373
1973	0.0039629848219410475
1974	0.030856135178684744
1975	0.1379890096995206
1976	0.47924757156217535
1977	0.9669951827440404
1978	1.5112649455092206
1979	2.2363348821289795
1980	2.887503267388589
1981	3.221554262328788
1982	3.4682076436648486
1983	4.542092099611636
1984	5.256905301476829
1985	7.448083613478628
1986	9.046062255662733
1987	11.384326328920404
1988	13.856760794943145
1989	15.762901212007591
1990	19.304972828084416
1991	23.434496148776066
1992	26.589805063345207
1993	29.824300541289762
1994	34.13808288350178
1995	38.12565611255864
1996	39.68109755530092
1997	41.002708454624695
1998	41.322115537664864
1999	42.226147504835595
2000	44.15167819389579
2001	46.04011036509586
2002	47.57815408523921
2003	49.6241578668573
2004	53.11013670604909
2005	56.891745925798254
2006	63.917817333575385
2007	67.17043977865403
2008	67.37942884917065
2009	69.79012671054437
2010	75.9717463537977
2011	78.44881643317817
2012	79.04774700688169
2013	80.83483524087059
2014	85.56601054533073
2015	89.80526347470713
2016	93.9009726511139
2017	98.43469178948203
2018	100
2019	102.56778721379496
2020	112.48170510226747
2021	120.25954042502549
2022	129.77662005111137
2023	138.34124372384568