Year	base year varies by country
1980	3.2049034600925537
1981	3.624027348002354
1982	4.089790193911001
1983	4.380145818948369
1984	4.851338229980043
1985	5.3159659874741605
1986	5.737818444996851
1987	6.598864789772854
1988	7.448012347050092
1989	7.800958506798157
1990	8.48600215969823
1991	11.616807754706768
1992	12.9682180552354
1993	13.834219810237592
1994	15.166481308558524
1995	16.215008596635776
1996	22.879936194635306
1997	23.688825056209428
1998	30.953058710828895
1999	32.024272370748776
2000	36.759183512256946
2001	44.22388598811498
2002	44.77461235518303
2003	55.46469907458146
2004	58.61669522535519
2005	58.38561060271379
2006	62.79826865450778
2007	66.22679542471404
2008	74.96383384233852
2009	80.885274469939
2010	80.04208607280697
2011	90.90929103697263
2012	100
2013	103.64331972115662
2014	106.67287242115489
2015	108.22179365399191
2016	110.51089899372579
2017	112.12339707023229
2018	113.03232169573975
2019	114.43198516411412
2020	120.34782608695652
2021	127.6286875522626
2022	133.9702292458198