Year	base year varies by country
1990	2.0715690430383
1991	4.73895586790647
1992	8.62601711781432
1993	10.9322967645462
1994	13.6721537627835
1995	18.265722307479
1996	23.6688118849449
1997	24.2020153917566
1998	29.956074290752
1999	35.1066773481462
2000	36.2585770603377
2001	62.1297814470049
2002	59.6854921180968
2003	67.5625963788851
2004	76.2284807124519
2005	88.8944277532714
2006	100
2007	106.60201902152
2008	116.424027888131
2009	126.376035589242
2010	148.408337143816
2011	174.075730762065
2012	195.036563757957
2013	208.60945022899
2014	212.354749094055
2015	254.06193854925
2016	268.928903806579
2017	293.014178117266
2018	334.067116906083
2019	359.799588664732
2020	399.071559263039
2021	425.775476110605
2022	533.632811195351
2023	728.058152801797