Year	Number of
1990	438.87
1991	460.53
1992	483.73
1993	508.87
1994	535.44
1995	563.49
1996	592.98
1997	623.91
1998	656.92
1999	691.61
2000	728.27
2001	755.04
2002	782.69
2003	812.68
2004	843.98
2005	876.93
2006	914.82
2007	954.85
2008	999.19
2009	1045.81
2010	1094.96
2011	1131.22
2012	1169.42
2013	1210.16
2014	1253.23
2015	1298.77
2016	1347.1