Year	base year varies by country
1960	0.01952196686347116
1961	0.018643823332838618
1962	0.018317857338610268
1963	0.017969799275612156
1964	0.01808241479549573
1965	0.01779803795861962
1966	0.017488389608442116
1967	0.017491599725422986
1968	0.017450111266088333
1969	0.01706802148544302
1970	0.01733407452097692
1971	0.01907251076331245
1972	0.020808003522899125
1973	0.02780384155689222
1974	0.04402180990453042
1975	0.049882752130932836
1976	0.057369273883125106
1977	0.0699261567930451
1978	0.07751996084740494
1979	0.10211740945643179
1980	0.13809471411394653
1981	0.17437749433751626
1982	0.18723424943718875
1983	0.2161300922689651
1984	0.25449026154661686
1985	0.26480853903885365
1986	0.29720930275115515
1987	0.361208627262883
1988	0.4337404008136493
1989	0.5081702877827873
1990	0.6240188691606395
1991	0.7838744892983739
1992	1.0138752778343527
1993	1.5197667481836434
1994	2.0354461986815893
1995	2.8076434885201054
1996	3.6171894651900205
1997	4.178869774058857
1998	4.570911158913704
1999	6.020248682310157
2000	7.5210521601128955
2001	8.634575442068696
2002	11.076406963002606
2003	12.531447490910233
2004	15.627747911946766
2005	18.779269499958435
2006	21.51777394409872
2007	26.453749312161467
2008	31.59159144161953
2009	33.0443361172181
2010	38.292644429673295
2011	51.08603816599576
2012	60.76882665416131
2013	83.11694664606352
2014	91.22813724682088
2015	91.40785820867747
2016	100
2017	113.03533116715793
2018	148.8010486219271
2019	194.237249763401
2020	280.21633658180184
2021	438.0332096006476
2022	659.6133952732878
2023	876.6874472704027