Year	Number
1996	41.5300559997559
1998	44.2622947692871
2000	42.0765037536621
2002	32.972972869873
2003	24.3243236541748
2004	16.4179096221924
2005	22.0588226318359
2006	19.0243911743164
2007	26.2135925292969
2008	21.8446598052979
2009	17.2248802185059
2010	20.5741634368896
2011	18.0094795227051
2012	17.0616111755371
2013	18.9573459625244
2014	18.75
2015	12.380952835083
2016	19.0476188659668
2017	17.619047164917
2018	16.1904754638672
2019	13.3333330154419
2020	15.7142858505249
2021	15.7142858505249
2022	16.0377349853516