Year	Number
1996	24.456521987915
1998	29.3478260040283
2000	30.9782600402832
2002	34.0540542602539
2003	33.5135116577148
2004	44.2786064147949
2005	31.3725490570068
2006	38.7254905700684
2007	47.0873794555664
2008	49.5145645141602
2009	52.1531105041504
2010	53.1100463867188
2011	54.9763031005859
2012	50.2369651794434
2013	48.3412322998047
2014	49.038459777832
2015	43.8095245361328
2016	39.0476188659668
2017	32.8571434020996
2018	39.0476188659668
2019	39.0476188659668
2020	36.6666679382324
2021	26.1904754638672
2022	20.7547168731689