Year	Number
1996	21.1956520080566
1998	21.1956520080566
2000	20.6521739959717
2002	21.0810813903809
2003	24.3243236541748
2004	16.9154224395752
2005	23.529411315918
2006	21.5686283111572
2007	16.5048542022705
2008	20.3883495330811
2009	23.4449768066406
2010	22.4880390167236
2011	22.274881362915
2012	25.1184825897217
2013	30.8056869506836
2014	28.365385055542
2015	27.1428565979004
2016	23.8095245361328
2017	24.2857151031494
2018	14.7619047164917
2019	14.7619047164917
2020	14.7619047164917
2021	13.3333330154419
2022	13.6792449951172