Year	Number
1996	68.87
1997	71.1
1998	88.03
1999	61.99
2000	69.06
2001	63.18
2002	71.94
2003	86.49
2004	100.9
2005	104.82
2006	100.71
2007	134.57
2008	146.7
2009	189.14
2010	235.62
2011	276.12
2012	246.97
2013	323.49
2014	222.8
2015	250.01
2016	366.88
2017	317.03
2018	387.92
2019	381.11
2020	378.39