Year	Number
1996	21.1956520080566
1998	13.043478012085
2000	20.6521739959717
2002	18.3783779144287
2003	20.5405406951904
2004	25.3731346130371
2005	23.0392150878906
2006	21.5686283111572
2007	23.3009700775146
2008	20.3883495330811
2009	22.0095691680908
2010	25.3588523864746
2011	22.274881362915
2012	22.274881362915
2013	21.8009471893311
2014	18.75
2015	16.6666660308838
2016	25.7142848968506
2017	29.5238094329834
2018	29.5238094329834
2019	31.9047622680664
2020	30.4761905670166
2021	27.1428565979004
2022	22.6415100097656