Year	Number
2002	9.249204116415774
2003	9.604771756093296
2004	9.552658365886705
2005	9.94008725591017
2006	10.287225783814819
2007	13.150051356032263
2008	13.461641205110084
2009	19.924330049464935
2010	20.94195546446227
2011	21.5615999593417
2012	8.517782573783974
2013	7.053482892599248
2014	6.313488965426998
2015	8.265277925590867
2016	9.338064394762185
2017	8.599858335166873
2018	7.682607307905475
2019	8.173653039472393
2020	17.35607650261467
2021	10.771877649244562
2022	12.10485009225676