Year	Number
1996	100
1998	100
2000	100
2002	100
2003	98.9189224243164
2004	100
2005	100
2006	100
2007	99.5145645141602
2008	99.5145645141602
2009	99.5215301513672
2010	99.5215301513672
2011	99.5260696411133
2012	100
2013	99.5260696411133
2014	100
2015	100
2016	100
2017	100
2018	100
2019	100
2020	100
2021	100
2022	100