Year	Number
1996	23.4972686767578
1998	25.6830596923828
2000	33.8797798156738
2002	26.4864864349365
2003	21.0810813903809
2004	20.8955230712891
2005	12.7450981140137
2006	21.9512195587158
2007	22.8155345916748
2008	16.990291595459
2009	15.7894735336304
2010	13.3971290588379
2011	12.3222751617432
2012	12.3222751617432
2013	10.9004735946655
2014	9.61538505554199
2015	10
2016	8.09523773193359
2017	10.9523811340332
2018	7.61904764175415
2019	8.09523773193359
2020	10.9523811340332
2021	9.5238094329834
2022	8.96226406097412