Year	Number of
1990	1055.58
1991	1080.99
1992	1127.67
1993	1184.83
1994	1223.33
1995	1270.34
1996	1282.72
1997	1306.58
1998	1343.13
1999	1380.59
2000	1422.43
2001	1416.67
2002	1411.32
2003	1408.56
2004	1405.92
2005	1435.56
2006	1466.74
2007	1501.54
2008	1539.64
2009	1580.72
2010	1625.42
2011	1670.18
2012	1723.16
2013	1778.58
2014	1852.36
2015	1937.79
2016	2021.81