Year	Number
1996	1.32
1997	1.9
1998	0.48
1999	0.83
2000	0.3
2001	0
2002	1.71
2003	1.83
2004	1.14
2005	0
2006	1.03
2007	0
2008	1.58
2009	2.75
2010	2.74
2011	2.89
2012	1.43
2013	6.31
2014	3.82
2015	4.45
2016	3.34
2017	10.32
2018	7.74
2019	15.96
2020	32.73