Year	base year varies by country
1960	5.781011650032131
1961	6.144866019818657
1962	6.406257554090092
1963	6.904273429480996
1964	7.170498292083612
1965	7.3874406717729615
1966	8.128205816750066
1967	8.576561901482863
1968	8.486959832411396
1969	8.741304973333124
1970	9.065647179337722
1971	9.8192761175736
1972	10.548629763629576
1973	11.375492407034207
1974	12.298470430198588
1975	13.319834361783144
1976	14.475430069320613
1977	16.577918462951555
1978	16.440596422137414
1979	19.252201110627002
1980	23.130366145828297
1981	29.55809295033766
1982	31.344802275845367
1983	33.331552298760094
1984	37.36846812961712
1985	38.30213431036675
1986	27.128381944704998
1987	29.197333847621632
1988	27.37940478037601
1989	30.868652602196693
1990	30.550993092610184
1991	30.098644183655175
1992	29.62631566784625
1993	29.291292813862025
1994	40.05667059349123
1995	41.416966891055544
1996	48.86867610826624
1997	51.29477017463431
1998	41.94779116177521
1999	54.26170868863876
2000	79.78646153433043
2001	68.67603067553587
2002	67.48180425081627
2003	64.61279042860546
2004	75.47241609195862
2005	100
2006	111.38030176257064
2007	118.88746456313461
2008	138.22950802289057
2009	108.97291041903627
2010	141.03021663009284
2011	156.47771532710686
2012	174.25998409747461
2013	172.33517420210848
2014	161.19445775538014
2015	133.38198609112396
2016	128.71029898243154
2017	144.62619863087718
2018	176.78302585853996
2019	174.45413447664916
2020	150.0313321461317
2021	184.97469037388228
2022	218.75273135324127
2023	202.1981758997626