Year	base year varies by country
1990	0.0666541263213819
1991	0.217650957595726
1992	0.347324458508456
1993	0.524776184800659
1994	0.906314543280298
1995	2.1385000909847
1996	3.48503328305984
1997	35.3108137487102
1998	47.2991982100264
1999	48.8691246255432
2000	52.4760752855494
2001	55.6864213511369
2002	57.8294465875984
2003	59.0955704054187
2004	62.3940236039459
2005	66.5084468634709
2006	71.0020729740094
2007	78.8488185801031
2008	85.2382980832073
2009	88.5949987344776
2010	89.2719796979306
2011	94.7290239801656
2012	95.7825802413302
2013	95.8514972616046
2014	97.1366581679664
2015	100
2016	103.323559744813
2017	108.29664716392
2018	112.882582938789
2019	118.796791063503
2020	123.857659914249
2021	132.694274403267
2022	154.166803362189
2023	165.745557556149