Year	Number
1996	39.6984939575195
1998	44.5
2000	48.2587051391602
2002	51.243782043457
2003	48.2587051391602
2004	49.519229888916
2005	49.7607650756836
2006	51.1961708068848
2007	52.6315803527832
2008	51.9230766296387
2009	54.028434753418
2010	51.6587677001953
2011	51.1737098693848
2012	51.6431922912598
2013	50.7042236328125
2014	54.3269233703613
2015	51.4285697937012
2016	49.523811340332
2017	50.9523811340332
2018	50.9523811340332
2019	52.3809509277344
2020	49.0476188659668
2021	52.3809509277344
2022	49.5283012390137