Year	Number
1996	1.15
1997	1.38
1998	1.2
1999	0.56
2000	1.6
2001	0.17
2002	1.33
2003	1.33
2004	1.89
2005	4.31
2006	2.18
2007	6.4
2008	9.96
2009	6.74
2010	8.31
2011	7.52
2012	17.88
2013	9.23
2014	17.23
2015	38.91
2016	42.31
2017	56.77
2018	89.9
2019	146.09
2020	176.64