Year	Number
1996	0
1998	0
2000	0.52910053730011
2002	5.29100513458252
2003	5.52763795852661
2004	4.36893224716187
2005	3.88349509239197
2006	5.31400966644287
2007	12.5603866577148
2008	11.5384616851807
2009	9.00473976135254
2010	9.00473976135254
2011	6.16113758087158
2012	6.16113758087158
2013	7.5829381942749
2014	12.380952835083
2015	9.0476188659668
2016	10.9523811340332
2017	13.3333330154419
2018	12.2641506195068
2019	16.0377349853516
2020	15.5660381317139
2021	13.2075471878052
2022	12.7358493804932