Year	Number
1996	45.52
1997	44.04
1998	54.33
1999	44.13
2000	44.06
2001	75.39
2002	89.35
2003	105.16
2004	134.67
2005	159.81
2006	187.7
2007	217.88
2008	292.95
2009	320.47
2010	396.47
2011	449.72
2012	596.55
2013	784.06
2014	1075.86
2015	1137.33
2016	1395.84
2017	1367.22
2018	1508.57
2019	1785.11
2020	2346.63