Year	base year varies by country
1990	0.17344361386375212
1991	0.3363441478546692
1992	4.613511725517657
1993	25.011204473427195
1994	62.999649014637235
1995	73.76730730143414
1996	75.8806085617202
1997	78.8621768366538
1998	79.95970881233913
1999	82.14905914515944
2000	88.86752396405927
2001	93.0611477368258
2002	93.9396141145014
2003	95.49116678098379
2004	95.33261128634143
2005	100
2006	103.25262417820976
2007	107.99455522249737
2008	113.92474579808281
2009	114.26091221997778
2010	116.59330082306612
2011	120.93310441671856
2012	122.14606135791419
2013	127.62222736438464
2014	129.4688799734992
2015	132.06268650368932
2016	136.63899252016984
2017	140.47448598109602
2018	145.98973244265366
2019	147.2571695826867
2020	149.28089647050427
2021	155.67836707863898
2022	167.68120692570918
2023	173.71944036867885