Year	Number
1996	44.2622947692871
1998	46.9945373535156
2000	45.3551902770996
2002	48.1081085205078
2003	51.8918914794922
2004	46.766170501709
2005	45.5882339477539
2006	51.2195129394531
2007	51.9417457580566
2008	52.9126205444336
2009	52.6315803527832
2010	45.4545440673828
2011	45.497631072998
2012	44.0758285522461
2013	43.6018943786621
2014	45.6730766296387
2015	46.1904754638672
2016	44.2857131958008
2017	41.4285697937012
2018	44.761905670166
2019	39.523811340332
2020	41.4285697937012
2021	44.2857131958008
2022	43.3962249755859