Year	Number of
1990	192675.31
1991	199262.94
1992	207060.78
1993	215794.39
1994	224826.42
1995	234066.9
1996	241907.47
1997	249425.34
1998	256917.47
1999	265065.3
2000	274241.55
2001	277755.61
2002	281785.53
2003	286378.24
2004	291415.15
2005	297001.84
2006	301882.3
2007	307303.87
2008	313699.8
2009	320453.14
2010	327709.07
2011	342949.61
2012	359276.39
2013	376581.32
2014	395088.36
2015	414908.18
2016	435511.4