Year	base year varies by country
1990	10.5955440232506
1991	11.9233735629378
1992	14.1765613757022
1993	17.8197226776576
1994	20.8520006024262
1995	23.191818362138
1996	25.306041149061
1997	28.1998416994779
1998	30.154486279658
1999	31.4191470547854
2000	33.3293835923274
2001	33.853694890492
2002	34.1696194520859
2003	36.2872178021094
2004	38.873350319603
2005	40.7780083199213
2006	43.9532860379406
2007	47.5264620954224
2008	54.7272795218238
2009	61.0960592465264
2010	62.0975456346528
2011	68.3476716551131
2012	74.85640143407
2013	80.3490364751316
2014	86.4837110425477
2015	94.473642463645
2016	100
2017	107.581934028202
2018	112.116543116457
2019	116.909787955755
2020	122.695481308957
2021	128.009112870216
2022	135.700878531211
2023	144.669763959482