Year	Number
1971	274139
1972	281258
1973	289696
1974	301698
1975	303499
1976	299000
1977	294492
1978	274755
1979	256330
1980	237905
1981	219480
1982	201015
1983	184104
1984	175100
1985	166000
1986	157380
1987	160000
1988	160000
1989	160000
1990	163000
1991	165000
1992	167000
1993	169000
1994	171000
1995	171000
2013	262147.75945
2014	258857
2015	258944
2016	229383