Year	Number
1996	55.2763824462891
1998	56
2000	55.7213935852051
2002	55.2238807678223
2003	53.7313423156738
2004	51.9230766296387
2005	52.6315803527832
2006	57.8947372436523
2007	54.0669860839844
2008	54.8076934814453
2009	57.3459701538086
2010	57.3459701538086
2011	59.1549301147461
2012	57.2769966125488
2013	56.3380279541016
2014	62.5
2015	57.6190490722656
2016	55.7142868041992
2017	49.0476188659668
2018	46.1904754638672
2019	48.0952377319336
2020	45.238094329834
2021	54.2857131958008
2022	54.2452812194824