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	99.5260696411133
2012	99.5260696411133
2013	99.5260696411133
2014	99.523811340332
2015	99.523811340332
2016	99.523811340332
2017	99.523811340332
2018	99.5283050537109
2019	99.5283050537109
2020	99.0566024780273
2021	98.1132049560547
2022	96.698112487793