Year	Number
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	1.62
2012	2.42
2013	8.96
2014	5.62
2015	5.51
2016	2.11
2017	5.73
2018	9.62
2019	8.92
2020	14.27