Year	base year varies by country
1990	2.12265847971057
1991	2.52307479703682
1992	3.70267169209982
1993	5.24442933217612
1994	7.51508180538825
1995	13.181577725212
1996	16.673521324896
1997	17.5164255067587
1998	18.5690478251454
1999	21.0629770952537
2000	25.8387412106387
2001	28.442376089088
2002	34.4462914797547
2003	37.8235174254815
2004	45.6634533557996
2005	54.731527852606
2006	67.792868255732
2007	72.6059795346195
2008	78.3573803056262
2009	78.8949894100645
2010	100
2011	109.778458096759
2012	120.698820290057
2013	126.691209799203
2014	132.598343181544
2015	136.395515688896
2016	149.412653688506
2017	166.025724255929
2018	183.007640701348
2019	202.012580098559
2020	217.868834463721
2021	239.941199476136
2022	267.081752211291
2023	300.792461706053