Year	Number
1996	0
1997	1.14
1998	0.13
1999	1.2
2000	0.25
2001	1
2002	2.08
2003	1.83
2004	0.67
2005	1.67
2006	1.58
2007	5.25
2008	5.29
2009	3.78
2010	2.19
2011	0.85
2012	2.08
2013	2.72
2014	1.7
2015	3.3
2016	3.34
2017	5.45
2018	4.64
2019	5.97
2020	7.29