Year	Number
1996	100
1998	100
2000	98.9417953491211
2002	99.4709014892578
2003	98.9949722290039
2004	99.0291290283203
2005	99.0291290283203
2006	98.5507278442383
2007	96.6183547973633
2008	98.5576934814453
2009	92.890998840332
2010	99.052131652832
2011	99.052131652832
2012	98.5782012939453
2013	99.052131652832
2014	97.1428604125977
2015	97.6190490722656
2016	98.0952377319336
2017	97.6190490722656
2018	99.5283050537109
2019	97.6415100097656
2020	98.5849075317383
2021	97.6415100097656
2022	97.6415100097656