Year	Number
1996	100
1998	100
2000	100
2002	100
2003	98.0099487304688
2004	93.2692337036133
2005	89.9038467407227
2006	93.2692337036133
2007	93.75
2008	90.8653869628906
2009	95.2606658935547
2010	94.3127975463867
2011	94.3661956787109
2012	93.4272308349609
2013	92.9577484130859
2014	95.5665054321289
2015	93.1034469604492
2016	93.596061706543
2017	94.0886688232422
2018	92.7184448242188
2019	94.6859893798828
2020	94.2028961181641
2021	94.2028961181641
2022	93.7198104858398