Year	base year varies by country
1990	0.00138850772086452
1991	0.00272642510920002
1992	0.0428653014934523
1993	0.575878889509972
1994	9.48315210115326
1995	24.7404697245697
1996	34.3644211913505
1997	39.9093714038407
1998	42.1693771363819
1999	47.7695297190062
2000	56.0940403254069
2001	61.7911937451347
2002	65.3770751902318
2003	73.051379275201
2004	84.8357552944261
2005	100
2006	121.551708909558
2007	140.425161015999
2008	169.825328511078
2009	177.791979148786
2010	212.536595121202
2011	256.197899155929
2012	268.4584284735
2013	293.959513236385
2014	310.924620851142
2015	316.594486390017
2016	359.773015253436
2017	400.107548107105
2018	436.93987255277
2019	470.292743709789
2020	490.096104707737
2021	558.366859935947
2022	668.750440660249
2023	731.258519658842