Year	Number
1996	0
1997	0.25
1998	0.14
1999	0
2000	0
2001	0.33
2002	0
2003	0
2004	0.23
2005	0.5
2006	0.27
2007	0
2008	0
2009	0.67
2010	0
2011	0.74
2012	0.5
2013	0.34
2014	0.37
2015	0.33
2016	0.47
2017	0
2018	0
2019	0.33
2020	0.9