Year	Number
1996	229.71
1997	166.55
1998	211.91
1999	163.63
2000	192.97
2001	204.41
2002	230.31
2003	255.34
2004	239.49
2005	249.15
2006	230.93
2007	225.01
2008	237.87
2009	272.18
2010	317.01
2011	368.18
2012	439.46
2013	625.14
2014	885.78
2015	1109.2
2016	1447.46
2017	1709.31
2018	2020.81
2019	2404.79
2020	2970.6