Year	Number
1996	24.456521987915
1998	38.5869560241699
2000	41.847827911377
2002	60.5405387878418
2003	63.7837829589844
2004	64.1791076660156
2005	61.764705657959
2006	60.294116973877
2007	61.6504859924316
2008	64.0776672363281
2009	63.6363639831543
2010	63.6363639831543
2011	59.7156410217285
2012	60.1895751953125
2013	60.6635055541992
2014	62.019229888916
2015	62.8571434020996
2016	66.1904754638672
2017	65.7142868041992
2018	62.8571434020996
2019	60.9523811340332
2020	57.1428565979004
2021	56.6666679382324
2022	51.4150924682617