Year	Number
1996	0
1997	1.23
1998	1.25
1999	1.33
2000	2.33
2001	0.75
2002	1.83
2003	1.59
2004	3.13
2005	0.68
2006	4.66
2007	1.76
2008	0.46
2009	2.39
2010	1.28
2011	1.95
2012	1.83
2013	1.63
2014	0.81
2015	2.88
2016	2.34
2017	6.73
2018	5.82
2019	2.62
2020	9.24