Year	Number
1996	24.6231155395508
1998	23.5
2000	16.9154224395752
2002	22.8855724334717
2003	17.9104480743408
2004	18.75
2005	18.6602878570557
2006	17.7033500671387
2007	15.7894735336304
2008	15.865385055542
2009	24.6445503234863
2010	26.5402851104736
2011	26.7605628967285
2012	22.5352115631104
2013	23.0046939849854
2014	25
2015	22.8571434020996
2016	19.0476188659668
2017	20.9523811340332
2018	20.9523811340332
2019	23.3333339691162
2020	21.9047622680664
2021	20
2022	12.2641506195068