Year	Number
1996	23.1182804107666
1998	30.4812831878662
2000	44.1489372253418
2002	36.5079383850098
2003	38.0952377319336
2004	29.5566501617432
2005	33.6585350036621
2006	34.634147644043
2007	32.5242729187012
2008	34.4660186767578
2009	30.1435413360596
2010	26.6666660308838
2011	24.1706161499023
2012	27.488151550293
2013	21.8009471893311
2014	13.4615383148193
2015	11.9047622680664
2016	12.8571424484253
2017	11.9047622680664
2018	11.4285717010498
2019	11.9047622680664
2020	11.9047622680664
2021	7.61904764175415
2022	8.01886749267578