Year	Number
1996	2.7173912525177
1998	3.26086950302124
2000	3.26086950302124
2002	2.70270276069641
2003	1.08108103275299
2004	1.49253726005554
2005	1.47058820724487
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0
2022	0