Year	Number
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0
2006	0
2007	65.14
2008	66.69
2009	73.23
2010	108.51
2011	139.48
2012	159.67
2013	190.26
2014	194.48
2015	226.38
2016	240.71
2017	284.05
2018	254.05
2019	278.72
2020	309.32