Year	base year varies by country
1990	10.9047857720947
1991	11.8360744215166
1992	13.5602691317911
1993	14.9149286984545
1994	20.7305771709968
1995	30.8960476882499
1996	37.0013589427097
1997	38.6634501529925
1998	41.0644386313676
1999	44.016619824979
2000	49.1094981028458
2001	52.997469978327
2002	61.7412710955507
2003	60.6891968732856
2004	69.1588609049904
2005	81.8590728502709
2006	90.6717236162302
2007	100
2008	107.48630027641
2009	114.934197017474
2010	126.678795096436
2011	139.83589181664
2012	147.479566185039
2013	155.520598192639
2014	165.989888424558
2015	176.785400504255
2016	192.625515108149
2017	202.182706620469
2018	218.959814091731
2019	233.240571633661
2020	243.295911192439
2021	259.452568396586
2022	281.067312765514
2023	306.22826365818