Year	Number
1996	39.7849464416504
1998	32.6203193664551
2000	34.5744667053223
2002	31.7460308074951
2003	29.6296291351318
2004	25.1231517791748
2005	17.0731716156006
2006	14.6341466903687
2007	12.62135887146
2008	15.5339803695679
2009	15.7894735336304
2010	18.0952377319336
2011	17.0616111755371
2012	18.4834117889404
2013	18.9573459625244
2014	18.75
2015	17.619047164917
2016	19.0476188659668
2017	19.5238094329834
2018	26.1904754638672
2019	26.1904754638672
2020	20.4761905670166
2021	19.5238094329834
2022	19.3396224975586