Year	Number
1996	60.8040199279785
1998	60
2000	59.2039794921875
2002	58.2089538574219
2003	58.7064666748047
2004	58.1730766296387
2005	57.4162673950195
2006	55.0239219665527
2007	55.5023918151855
2008	58.1730766296387
2009	60.6635055541992
2010	61.1374397277832
2011	60.5633811950684
2012	61.0328636169434
2013	60.0938949584961
2014	65.8653869628906
2015	61.9047622680664
2016	58.0952377319336
2017	58.0952377319336
2018	59.0476188659668
2019	60.476188659668
2020	59.523811340332
2021	55.7142868041992
2022	56.1320762634277