Year	Number
1996	1469.22
1997	1403.3
1998	1495.5
1999	1547.68
2000	1828.44
2001	1878.8
2002	2124.29
2003	2379.73
2004	2523.44
2005	2996.18
2006	2968.51
2007	3473.85
2008	3718.57
2009	4131.55
2010	3970.63
2011	4529.57
2012	4432.34
2013	4239.71
2014	4021.73
2015	4079.08
2016	4029.84
2017	4359.05
2018	4619.34
2019	4594.8
2020	4800.05