Year	Number of
1990	1188.07
1991	1223.2
1992	1260.79
1993	1304.63
1994	1352.03
1995	1400.72
1996	1431.3
1997	1473.56
1998	1499.14
1999	1517.45
2000	1560.33
2001	1578.71
2002	1613.59
2003	1658.87
2004	1717.49
2005	1782.52
2006	1862.21
2007	1934.23
2008	2019.11
2009	2115.6
2010	2215.92
2011	2310.73
2012	2408.08
2013	2512.65
2014	2618.86
2015	2723.83
2016	2829.42