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	97.5961532592773
2015	97.1428604125977
2016	96.1904754638672
2017	98.0952377319336
2018	99.523811340332
2019	99.523811340332
2020	99.523811340332
2021	99.523811340332
2022	100