Year	Number
1996	1.45976829528809
1998	1.46096003055573
2000	1.4913969039917
2002	1.46941840648651
2003	1.22844505310059
2004	1.14331793785095
2005	0.847438395023346
2006	1.06922149658203
2007	1.09091985225677
2008	1.11797952651978
2009	0.890962958335876
2010	0.894479393959045
2011	0.876532793045044
2012	0.890999794006348
2013	0.895805478096008
2014	0.586509823799133
2015	0.783619344234467
2016	0.764758408069611
2017	0.744137227535248
2018	0.739916861057281
2019	0.733900785446167
2020	0.727434754371643
2021	0.741474807262421
2022	0.72119528055191