Year	base year varies by country
1990	33.3634283135285
1991	32.8694374847894
1992	32.353627784926
1993	31.9877637052081
1994	43.7441707303398
1995	45.229691933247
1996	53.3673837433965
1997	56.0168169457734
1998	45.8093823364215
1999	59.2568831564714
2000	87.1313702216318
2001	74.9981455383573
2002	73.6939821158959
2003	70.5608552581963
2004	82.4201863520413
2005	100
2006	111.380301762571
2007	118.887464563135
2008	138.229508022891
2009	108.972910419036
2010	141.030216630093
2011	156.477715327107
2012	174.259984097475
2013	172.335174202108
2014	161.19445775538
2015	133.381986091124
2016	128.710298982432
2017	144.626198630877
2018	176.78302585854
2019	174.454134476649
2020	150.031332146132
2021	184.974690373882
2022	218.752731353241
2023	202.198175899763