Year	Number
1996	100
1998	100
2000	100
2002	100
2003	99.4974899291992
2004	100
2005	100
2006	100
2007	100
2008	100
2009	100
2010	100
2011	99.5260696411133
2012	99.5260696411133
2013	99.5260696411133
2014	98.0952377319336
2015	98.5714263916016
2016	99.523811340332
2017	98.0952377319336
2018	98.1132049560547
2019	97.6415100097656
2020	99.0566024780273
2021	97.6415100097656
2022	94.3396224975586