Year	Number of
1990	753.67
1991	789.67
1992	846.73
1993	901.83
1994	957.64
1995	1017.47
1996	1089.8
1997	1189.17
1998	1300.61
1999	1433.41
2000	1553.58
2001	1662.3
2002	1779.09
2003	1915.2
2004	2062.8
2005	2185.89
2006	2343.09
2007	2489.94
2008	2644.67
2009	2797.93
2010	2961.8
2011	3053.75
2012	3137.58
2013	3201.78
2014	3287.26
2015	3381.91
2016	3534.03