Year	base year varies by country
1990	36.50537155349664
1991	38.98111076905948
1992	40.35930647379441
1993	42.98845059981586
1994	46.45344188622915
1995	50.51574259166319
1996	54.31888783239541
1997	56.01754858198994
1998	57.86345477656938
1999	59.14251682478254
2000	62.14677784863145
2001	63.8288922726268
2002	64.96133783740659
2003	67.40789758124501
2004	70.16809742464604
2005	72.36205704559762
2006	75.86895189963849
2007	79.85226904388193
2008	85.48076003117004
2009	85.84696533068876
2010	88.97706279607844
2011	95.71605864468698
2012	97.66094723392098
2013	98.57247468540784
2014	100
2015	99.42342357938244
2016	99.25033746820762
2017	101.11037264748515
2018	103.87649702135771
2019	104.09473540378187
2020	104.14288087073902
2021	112.41895538534519
2022	123.7204336380493
2023	123.83022710107636