Year	Number of
1990	262.02
1991	290.7
1992	361.46
1993	452.8
1994	591.14
1995	787.09
1996	1035.49
1997	1339.83
1998	1476.8
1999	1521.48
2000	1527.37
2001	1505.06
2002	1459.33
2003	1392.35
2004	1190.07
2005	1219.32
2006	1491.68
2007	1635.85
2008	1755.46
2009	1873.96
2010	1974.53
2011	2024.75
2012	2093.54
2013	2141.98
2014	2198.24
2015	2255.14
2016	2314.06