Year	Number
1996	21.1055278778076
1998	22.5
2000	19.9004974365234
2002	22.3880596160889
2003	19.4029846191406
2004	21.634614944458
2005	27.7511959075928
2006	17.2248802185059
2007	20.0956935882568
2008	18.75
2009	19.9052124023438
2010	22.274881362915
2011	20.1877937316895
2012	9.85915470123291
2013	11.2676057815552
2014	16.3461532592773
2015	17.1428565979004
2016	11.4285717010498
2017	13.8095235824585
2018	15.2380952835083
2019	14.7619047164917
2020	16.6666660308838
2021	15.2380952835083
2022	16.9811325073242