Year	Number
1996	62.5
1998	63.1840782165527
2000	59.2039794921875
2002	58.2089538574219
2003	56.2189064025879
2004	58.1730766296387
2005	54.3269233703613
2006	62.980770111084
2007	65.8653869628906
2008	68.2692337036133
2009	67.7725143432617
2010	68.2464447021484
2011	68.5446014404297
2012	68.5446014404297
2013	68.0751190185547
2014	70.4433517456055
2015	70.9359588623047
2016	70.9359588623047
2017	70.9359588623047
2018	70.8737869262695
2019	70.0483093261719
2020	68.1159439086914
2021	67.6328506469727
2022	67.6328506469727