Year	Number of
1990	1090.87
1991	1122.64
1992	1175.1
1993	1224.96
1994	1280.53
1995	1331.68
1996	1394.91
1997	1473.37
1998	1585.86
1999	1647.96
2000	1712.31
2001	1770.91
2002	1872.85
2003	1988.34
2004	2067.27
2005	2217.04
2006	2307.14
2007	2415.5
2008	2642.67
2009	2793.78
2010	2950.91
2011	3067.79
2012	3209.16
2013	3434.3
2014	3559.22
2015	3660.65
2016	3739.23