Year	base year varies by country
1960	0.000428800693329726
1961	0.00044368372161623264
1962	0.0004522918505361636
1963	0.0004828018716583702
1964	0.0005307673503841823
1965	0.0006210328055037234
1966	0.000671662597993859
1967	0.0006456131272614351
1968	0.0007270670187532157
1969	0.000807312074030766
1970	0.0008306365670767413
1971	0.0008736802584283327
1972	0.0010088609550384926
1973	0.0012195362644404164
1974	0.0015191608821709514
1975	0.0019667592086774323
1976	0.002518408610188324
1977	0.004212058104713311
1978	0.007299778675072491
1979	0.010070006590188823
1980	0.015218411755032798
1981	0.026728639220101703
1982	0.034183411475882046
1983	0.07624993249359031
1984	0.10317563221748201
1985	0.1244797649230541
1986	0.17639504115022664
1987	0.24554453774097537
1988	0.3275634216490802
1989	0.42024523514550316
1990	0.5512213308552284
1991	0.6616935779795108
1992	0.7354729602616681
1993	0.96903867016872
1994	1.2609996234008272
1995	1.803801079878279
1996	2.5223947148748747
1997	3.0132065057505564
1998	3.5269119696475455
1999	4.0196626620215685
2000	5.114221381017275
2001	6.894888120888178
2002	8.468204008313501
2003	10.898951769886807
2004	12.462967819910949
2005	14.327891229283876
2006	26.461246961205482
2007	30.722629834230947
2008	36.68597557007026
2009	42.43340910746037
2010	49.4755069307102
2011	56.359935740784216
2012	64.92962106766399
2013	100
2014	123.93995875939987
2015	140.36568019790138
2016	162.47133821486884
2017	179.81890378783518
2018	198.82303315782616
2019	215.68535436654358
2020	235.88552792007422
2021	264.4420696633175
2022	338.93076731631953
2023	451.04847219634985