Year	Number
1996	31.5217399597168
1998	34.7826080322266
2000	33.152172088623
2002	28.1081085205078
2003	29.1891899108887
2004	32.8358192443848
2005	35.7843132019043
2006	38.7254905700684
2007	34.9514579772949
2008	31.5533981323242
2009	34.9282302856445
2010	34.9282302856445
2011	35.5450248718262
2012	36.9668235778809
2013	39.8104248046875
2014	38.9423065185547
2015	36.6666679382324
2016	34.2857131958008
2017	29.5238094329834
2018	29.0476188659668
2019	28.0952377319336
2020	26.1904754638672
2021	29.0476188659668
2022	30.1886787414551