Year	base year varies by country
1990	0.169809146379376
1991	0.328274958712676
1992	0.898457975031306
1993	3.76361552824758
1994	6.18435001487655
1995	9.91180776577511
1996	10.9830335964007
1997	13.3632913803551
1998	13.1051397197519
1999	14.5312091760046
2000	16.2749094320906
2001	17.975400612183
2002	19.1203774312076
2003	21.0776491182074
2004	24.5958192325258
2005	29.5391949025525
2006	36.03391020883
2007	40.2241378349506
2008	48.8517141116537
2009	49.7440901730316
2010	69.2329233251743
2011	79.7004328078695
2012	89.8896380889828
2013	92.5034924360396
2014	99.3939264323291
2015	100
2016	102.993126760577
2017	114.116844224137
2018	123.20124782975
2019	135.487138998204
2020	140.5092702744
2021	160.770799054486
2022	189.250883758708
2023	226.15371693544