Year	Number
1996	62.5
1998	60.8695640563965
2000	59.7826080322266
2002	61.0810813903809
2003	61.0810813903809
2004	58.7064666748047
2005	58.3333320617676
2006	57.3529396057129
2007	59.7087364196777
2008	58.737865447998
2009	58.3732070922852
2010	58.8516731262207
2011	58.7677726745605
2012	57.3459701538086
2013	57.8199043273926
2014	53.8461532592773
2015	52.8571434020996
2016	57.1428565979004
2017	56.6666679382324
2018	60.9523811340332
2019	59.0476188659668
2020	54.761905670166
2021	59.523811340332
2022	58.9622650146484