Year	Number
1971	67114
1972	69496
1973	70911
1974	73745
1975	78390
1976	81747
1977	85855
1978	87878
1979	90668
1981	91386
1984	102853
1986	90685
1987	91252
1988	91979
1989	92820
1991	96779
1992	97955
1993	98526
1995	101035
1996	102267
1997	103774
1998	104603
1999	105469