Year	base year varies by country
1990	0.496684106982244
1991	1.30421666912954
1992	13.4659670450286
1993	20.6963303655247
1994	28.1991195961453
1995	36.467866068484
1996	41.0023775433803
1997	43.4163245220569
1998	45.5106519950774
1999	46.1896018772061
2000	47.8608466417364
2001	48.9628429953726
2002	51.4466051978032
2003	54.0282510871078
2004	57.8438885991786
2005	64.3218319416368
2006	72.3193213075685
2007	86.8285088231734
2008	96.9546643556839
2009	87.5949753883579
2010	87.2790667769076
2011	92.9726650907349
2012	96.3512913459491
2013	98.007010714248
2014	99.884421264999
2015	100
2016	100.863392494557
2017	103.836721453537
2018	107.878639012202
2019	112.469844392689
2020	114.79889417446
2021	119.13052862391
2022	133.189442756559
2023	140.393223735028