Year	Number
1996	55.62
1997	65.65
1998	85.87
1999	85.08
2000	100.36
2001	114.36
2002	121.98
2003	232.79
2004	225.6
2005	297.24
2006	362.99
2007	389.93
2008	353.36
2009	383.9
2010	381.26
2011	392.74
2012	398.46
2013	457.37
2014	500.32
2015	532.27
2016	607.67
2017	677.47
2018	827.87
2019	1003.82
2020	1464.1