Year	Number
1971	48177
1972	72279
1973	99734
1974	181942
1975	125488
1976	71081
1977	44832
1978	67097
1979	53649
1981	25606
1982	89492
1983	112813
1984	99981
1985	44206
1991	44446
1992	61983
1994	32600
1998	89435
1999	96947
2000	95001
2001	87891
2002	56871
2003	35658
2010	30423
2011	36868
2012	45381
2013	55421
2014	66652
2015	46745