Year	Number
1996	70.1086959838867
1998	73.9130401611328
2000	69.5652160644531
2002	66.4864883422852
2003	63.2432441711426
2004	62.1890563964844
2005	57.3529396057129
2006	60.294116973877
2007	63.5922317504883
2008	71.8446578979492
2009	63.1578941345215
2010	66.0287094116211
2011	68.2464447021484
2012	67.2985763549805
2013	65.8767776489258
2014	67.788459777832
2015	67.1428604125977
2016	66.6666641235352
2017	68.0952377319336
2018	64.7619018554688
2019	64.2857131958008
2020	61.9047622680664
2021	59.0476188659668
2022	55.1886787414551