Year	Number
1996	1.4
1997	0.67
1998	0.25
1999	0.5
2000	0.42
2001	0
2002	0.12
2003	1.83
2004	0.13
2005	1
2006	0.7
2007	1.26
2008	0
2009	1.13
2010	1.02
2011	0.05
2012	0.92
2013	2.2
2014	1.51
2015	0.46
2016	2.42
2017	4.25
2018	1.22
2019	6.53
2020	7.4