Year	Number
1996	17.5879402160645
1998	16
2000	20.3980102539063
2002	22.8855724334717
2003	21.8905467987061
2004	21.634614944458
2005	16.7464122772217
2006	19.1387557983398
2007	15.7894735336304
2008	18.75
2009	21.3270149230957
2010	25.5924167633057
2011	24.8826293945313
2012	24.4131450653076
2013	23.474178314209
2014	24.0384616851807
2015	26.6666660308838
2016	24.2857151031494
2017	22.8571434020996
2018	21.9047622680664
2019	23.8095245361328
2020	29.0476188659668
2021	23.3333339691162
2022	23.1132068634033