Year	base year varies by country
1990	4.87199231544243
1991	7.46054762658458
1992	11.9395421460443
1993	18.2443844900377
1994	23.9197101510244
1995	29.9443322419621
1996	35.5954589111966
1997	39.0157194869069
1998	42.2669214160817
1999	45.1901274047538
2000	49.9744424587711
2001	53.8761317875935
2002	58.7701579385806
2003	65.6016334860954
2004	74.0370848239623
2005	82.528208449911
2006	89.8304635574266
2007	100
2008	113.54680952549
2009	126.782399032694
2010	139.220050529692
2011	147.289507049276
2012	156.969231485917
2013	170.179472645365
2014	181.972818018095
2015	194.083851185896
2016	203.136138905103
2017	216.441205293203
2018	227.24863662095
2019	234.48083151398
2020	242.603697825336
2021	260.619353122899
2022	293.972897690998
2023	328.328196753235