Year	Number
1996	49.4565200805664
1998	48.3695640563965
2000	48.9130439758301
2002	48.1081085205078
2003	52.972972869873
2004	44.7761192321777
2005	48.529411315918
2006	41.6666679382324
2007	40.7766990661621
2008	47.5728149414063
2009	48.3253593444824
2010	52.1531105041504
2011	52.1327018737793
2012	46.445499420166
2013	46.445499420166
2014	39.4230766296387
2015	34.2857131958008
2016	31.9047622680664
2017	33.8095245361328
2018	29.0476188659668
2019	35.238094329834
2020	36.6666679382324
2021	35.238094329834
2022	29.7169818878174