Year	Number
1996	64.8241195678711
1998	64.5
2000	67.6616897583008
2002	62.1890563964844
2003	57.2139320373535
2004	56.25
2005	53.5885162353516
2006	51.6746406555176
2007	51.1961708068848
2008	50.480770111084
2009	47.3933639526367
2010	47.3933639526367
2011	48.8262901306152
2012	50.2347412109375
2013	52.1126747131348
2014	48.0769233703613
2015	50
2016	52.8571434020996
2017	53.8095245361328
2018	52.8571434020996
2019	56.1904754638672
2020	55.238094329834
2021	55.238094329834
2022	54.7169799804688