Year	base year varies by country
1980	29.76847307306046
1981	34.105912552186105
1982	36.3322746905627
1983	41.85800821931443
1984	44.43622726159455
1985	47.57864873192554
1986	51.095748275719664
1987	52.742565308651464
1988	53.76471152722584
1989	56.969598569351064
1990	58.20845203761566
1991	62.93520457994878
1992	58.67769159318481
1993	60.3399724184783
1994	66.0220653713643
1995	71.51537118789189
1996	73.80330251393325
1997	74.48524947854077
1998	75.4878685022884
1999	79.87480493642289
2000	76.31245957412956
2001	82.89828826127514
2002	86.35586994894625
2003	90.77007349735774
2004	93.84562007118191
2005	94.14237912278857
2006	97.07115847165359
2007	100
2008	105.03315131116278
2009	103.86341231956084
2010	109.5516795139494
2011	112.6949492645241
2012	116.07962425858787
2013	117.60107758538399
2014	117.03580738849348
2015	110.1955200605651
2016	111.6801534844493
2017	110.71391109498086
2018	112.05434364117185
2019	116.84846878381494
2020	123.20640570008668
2021	122.72841979609754
2022	135.54773439043774
2023	140.4959304348875