Year	Number
1996	21.8579235076904
1998	16.9398899078369
2000	12.021858215332
2002	28.1081085205078
2003	24.8648643493652
2004	19.9004974365234
2005	31.3725490570068
2006	19.0243911743164
2007	21.8446598052979
2008	16.990291595459
2009	11.9617223739624
2010	6.69856452941895
2011	6.63507127761841
2012	5.21327018737793
2013	5.21327018737793
2014	3.8461537361145
2015	4.7619047164917
2016	6.1904764175415
2017	5.7142858505249
2018	6.66666650772095
2019	6.66666650772095
2020	7.61904764175415
2021	8.09523773193359
2022	8.96226406097412