Year	Number
1996	57.9234962463379
1998	53.5519142150879
2000	49.1803283691406
2002	50.8108100891113
2003	47.5675659179688
2004	43.7810935974121
2005	44.1176452636719
2006	32.6829261779785
2007	24.7572822570801
2008	21.8446598052979
2009	24.4019145965576
2010	25.8373203277588
2011	27.488151550293
2012	31.2796211242676
2013	33.1753540039063
2014	13.942307472229
2015	12.380952835083
2016	11.9047622680664
2017	11.9047622680664
2018	11.4285717010498
2019	10.9523811340332
2020	11.4285717010498
2021	12.380952835083
2022	14.6226415634155