Year	Number
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	1.67
2004	1
2005	2.03
2006	3.87
2007	3.29
2008	1.28
2009	2.63
2010	1.1
2011	3.06
2012	6
2013	6.29
2014	11.84
2015	9.07
2016	8.56
2017	14.24
2018	15.79
2019	14.09
2020	11.87