Year	Number
1996	21.3114757537842
1998	27.8688526153564
2000	31.1475410461426
2002	23.7837829589844
2003	36.7567558288574
2004	46.2686576843262
2005	35.294116973877
2006	53.1707305908203
2007	56.3106803894043
2008	57.7669906616211
2009	56.9377975463867
2010	61.7224884033203
2011	63.9810409545898
2012	61.1374397277832
2013	61.1374397277832
2014	62.019229888916
2015	58.5714302062988
2016	65.7142868041992
2017	67.6190490722656
2018	66.6666641235352
2019	66.6666641235352
2020	70.9523773193359
2021	69.523811340332
2022	70.7547149658203