Year	Number of
1990	53559.08
1991	53551.48
1992	57439.33
1993	65385.41
1994	68495.93
1995	63874.55
1996	57205.51
1997	51923.03
1998	49542.27
1999	51385.09
2000	52375.07
2001	51399.47
2002	51348.62
2003	50614.87
2004	49560.51
2005	49706.92
2006	46658.11
2007	45699.94
2008	45956.09
2009	44027.7
2010	44056.82
2011	42983.56
2012	41558.78
2013	41453.08
2014	41792.17
2015	42541.18
2016	43063.99