Year	base year varies by country
1990	0.01436480719653007
1991	0.021327775114792516
1992	0.31181821106942115
1993	23.837921261261403
1994	35.546695207461894
1995	40.30371262307878
1996	40.96454596407901
1997	45.53180360760106
1998	44.42096662001196
1999	48.16713054348739
2000	62.77747022391438
2001	65.74440730318186
2002	69.03679936832731
2003	70.01081297741729
2004	71.5244268553461
2005	75.95108491138227
2006	81.87536626557133
2007	86.94964890407779
2008	93.32771109311636
2009	93.50080275982576
2010	94.81569890739141
2011	97.12211724471108
2012	97.89498916807938
2013	97.67558495734757
2014	98.65267018784844
2015	100
2016	101.33330596746471
2017	103.13572860117137
2018	106.01489128574302
2019	108.635054290237
2020	108.70256288276552
2021	114.09921511962256
2022	127.57300899575787
2023	134.6284367696868