Year	Number
1996	0.13
1997	0
1998	2.73
1999	0.67
2000	4
2001	1
2002	5.5
2003	7.34
2004	6.75
2005	9.15
2006	14.86
2007	13.23
2008	12.5
2009	26.14
2010	27.68
2011	41.87
2012	34.65
2013	27.24
2014	35.01
2015	21.19
2016	60.99
2017	73.28
2018	87.7
2019	133.29
2020	119.74