Year	Number
1996	220.9
1997	210.93
1998	172.07
1999	165.6
2000	158.76
2001	168.62
2002	255.89
2003	287.37
2004	371.53
2005	360.53
2006	284.11
2007	416.36
2008	472.58
2009	630.74
2010	602.97
2011	637.21
2012	679.62
2013	474.14
2014	389.81
2015	452.3
2016	585.09
2017	724.53
2018	803.23
2019	860.37
2020	993.56