Year	Number
1996	68.3417053222656
1998	69
2000	64.6766204833984
2002	66.1691513061523
2003	65.6716384887695
2004	64.4230804443359
2005	63.6363639831543
2006	62.6794242858887
2007	59.8086128234863
2008	62.980770111084
2009	66.3507080078125
2010	65.4028472900391
2011	63.3802833557129
2012	66.1971817016602
2013	66.6666641235352
2014	72.5961532592773
2015	69.0476226806641
2016	66.1904754638672
2017	66.6666641235352
2018	68.0952377319336
2019	70
2020	67.1428604125977
2021	63.8095245361328
2022	64.6226425170898