Year	base year varies by country
1990	22.9110382485959
1991	26.061722746019
1992	28.3981958982932
1993	31.1987643124506
1994	34.3124149581869
1995	37.4220469518209
1996	40.2567738527222
1997	42.8639117277058
1998	46.2973828646763
1999	47.7179696877321
2000	49.4572754437583
2001	51.047631514634
2002	52.9444000776795
2003	54.9921825701831
2004	58.1407122653851
2005	61.4093268655269
2006	66.5682864752233
2007	71.1910667115851
2008	77.7363517617385
2009	83.2092750021032
2010	91.9679089631846
2011	99.9999988608692
2012	107.934386248432
2013	114.611751371953
2014	118.430336326022
2015	121.130060189743
2016	125.052221196656
2017	130.015866407521
2018	135.065995050433
2019	138.315030740189
2020	144.974702950814
2021	157.087205592233
2022	167.686685341603
2023	169.978068777188