Year	Number
1971	98301
1972	112311
1973	123081
1974	133361
1975	134117
1976	132591
1977	131521
1978	124728
1979	125039
1980	106575
1981	100425
1982	108212
1983	75384
1984	99986
1985	101543
1986	109415
1987	118437
1988	131471
1989	133753
1990	130738
1991	134949
1992	149724
1993	134322
1994	137635
1995	131874
1996	133895
1997	135365
1998	132371
1999	101362
2000	119644
2001	134515
2002	162498
2003	134099
2004	124596
2005	137334
2006	124970
2007	109031
2010	111738
2011	114876
2012	122477
2013	124944
2014	115171
2015	106822
2016	103928
2017	103933