Year	Number
1996	45.226131439209
1998	42.5
2000	48.2587051391602
2002	55.2238807678223
2003	49.7512435913086
2004	50
2005	49.7607650756836
2006	51.1961708068848
2007	51.6746406555176
2008	48.0769233703613
2009	44.5497627258301
2010	44.0758285522461
2011	44.6009407043457
2012	44.6009407043457
2013	39.9061050415039
2014	39.9038467407227
2015	48.5714302062988
2016	47.6190490722656
2017	45.238094329834
2018	44.2857131958008
2019	45.7142868041992
2020	44.761905670166
2021	44.2857131958008
2022	40.0943412780762