Year	base year varies by country
1990	0.006133990236138792
1991	0.014710952920719125
1992	0.1537339480919191
1993	1.4765488060246472
1994	5.558336973071194
1995	7.711498890627102
1996	9.85930381457092
1997	11.092006636887255
1998	12.141502375498371
1999	16.971594299553853
2000	21.60971921374496
2001	24.22217240413474
2002	26.60258267485423
2003	30.557315289398897
2004	32.99795460274667
2005	36.08133102293732
2006	40.92277498099751
2007	47.43306260719763
2008	51.81789294029014
2009	52.9420260111899
2010	70.57433182541548
2011	76.35493320755874
2012	82.02369297209168
2013	85.24218065096166
2014	89.62636263815502
2015	100.00000013629531
2016	103.55087397202209
2017	110.02535766870878
2018	113.55830725706002
2019	119.63562081746946
2020	126.30531792494631
2021	134.3657804608236
2022	160.2354977831029
2023	174.1894306302338