Year	Number of
1990	514.36
1991	551.18
1992	591.16
1993	634.85
1994	681.88
1995	732.76
1996	771.35
1997	811.85
1998	854.95
1999	900.89
2000	950.32
2001	984.23
2002	1019.9
2003	1057.79
2004	1097.42
2005	1139.05
2006	1211.71
2007	1289.4
2008	1373.96
2009	1464.54
2010	1561.92
2011	1656.79
2012	1757.87
2013	1866.09
2014	1981.76
2015	2105.58
2016	2238.67