Year	Number
1996	100
1998	100
2000	100
2002	100
2003	100
2004	100
2005	100
2006	100
2007	100
2008	100
2009	100
2010	100
2011	100
2012	99.06103515625
2013	98.591552734375
2014	99.5073928833008
2015	99.5073928833008
2016	99.5073928833008
2017	99.5073928833008
2018	99.5145645141602
2019	96.1352691650391
2020	96.1352691650391
2021	96.1352691650391
2022	96.6183547973633