Year	Number
1996	100
1998	100
2000	100
2002	100
2003	99.4594573974609
2004	100
2005	100
2006	99.0243911743164
2007	99.5145645141602
2008	99.0291290283203
2009	98.5645904541016
2010	99.5215301513672
2011	99.5260696411133
2012	100
2013	100
2014	99.5192337036133
2015	99.523811340332
2016	99.523811340332
2017	100
2018	99.523811340332
2019	99.523811340332
2020	100
2021	99.523811340332
2022	100