Year	base year varies by country
1980	2.7097321039631646
1981	2.651755434966192
1982	2.6512855677789773
1983	2.6508413403315223
1984	2.6500895548976766
1985	2.659397261652195
1986	2.5951116402423584
1987	2.59510369678934
1988	2.5950886820572587
1989	2.595184159526194
1990	2.583989344432309
1991	3.501673701571628
1992	11.660036229812212
1993	26.310966690896898
1994	35.74146840414774
1995	39.30512965512827
1996	54.308706622465465
1997	60.41281216863218
1998	64.47911392041938
1999	65.83501296031777
2000	69.55302653320173
2001	72.20359317374411
2002	74.83720210148003
2003	78.72771530976253
2004	81.20950334284144
2005	83.89495393638953
2006	85.97402936150067
2007	89.74546017474037
2008	93.44035743572682
2009	95.70005929316787
2010	100
2011	102.31474379699794
2012	103.38159457510486
2013	103.6801047570914
2014	105.28706039877311
2015	105.88087031226084
2016	105.21101136606221
2017	106.73734073489707
2018	108.30953211769723
2019	109.67100982833402
2020	110.43491495870059
2021	114.2498139888652
2022	125.52171598199303
2023	131.2368236568681