Year	base year varies by country
1990	31.5204429288091
1991	31.7589329514759
1992	32.7196833778794
1993	33.4978627484591
1994	44.7209788517124
1995	51.4736015462237
1996	55.0290343649075
1997	57.0472292486725
1998	60.0317148023981
1999	65.160380574224
2000	67.9890289655435
2001	69.3286070003708
2002	71.7926935395801
2003	73.9907733987081
2004	74.560288523362
2005	77.7616568908371
2006	79.3902325471868
2007	79.6999761102808
2008	84.8279938811868
2009	86.9823637072546
2010	87.7485788849948
2011	91.0243062015658
2012	98.0321838636733
2013	99.4019859949445
2014	99.1556851160345
2015	100
2016	100.683591111275
2017	100.313178470008
2018	100.985725781806
2019	100.584253198484
2020	103.479100482781
2021	105.154142621048
2022	109.50624124514
2023	113.213536005662