Year	Number
1996	0.25
1997	1.33
1998	1.46
1999	3.24
2000	1.5
2001	1
2002	0.34
2003	0
2004	0.23
2005	1.96
2006	1.94
2007	1.17
2008	4.16
2009	2.82
2010	4.41
2011	4.63
2012	8.85
2013	12.97
2014	15.2
2015	16.63
2016	20.64
2017	28.03
2018	26.05
2019	33.88
2020	33.69