Year	Number
1996	27.4193553924561
1998	33.6898384094238
2000	30.8510646820068
2002	32.8042335510254
2003	19.0476188659668
2004	15.2709360122681
2005	13.1707315444946
2006	11.7073173522949
2007	6.7961163520813
2008	4.36893224716187
2009	7.17703342437744
2010	3.80952382087708
2011	4.26540279388428
2012	11.8483409881592
2013	9.95260620117188
2014	12.5
2015	12.8571424484253
2016	10
2017	9.5238094329834
2018	9.5238094329834
2019	11.9047622680664
2020	10.4761905670166
2021	20.9523811340332
2022	20.2830181121826