Year	Number of
1990	1044.04
1991	1066.92
1992	1106.79
1993	1154.87
1994	1190.98
1995	1234.23
1996	1248.22
1997	1275.38
1998	1312.16
1999	1345.89
2000	1385.05
2001	1374.49
2002	1365.03
2003	1358.1
2004	1351.16
2005	1380.74
2006	1412.39
2007	1447.7
2008	1487.57
2009	1529.73
2010	1576.38
2011	1621.84
2012	1675.37
2013	1732.57
2014	1805.12
2015	1888.72
2016	1969.61