Year	Number
1971	776352
1972	787916
1977	865999
1978	884325
1979	902432
1980	915927
1981	923518
1982	928081
1983	940176
1984	955188
1985	962732
1986	969101
1987	981228
1988	1010572
1989	1042711
1991	1089177
1992	1113415
1993	1130994
1994	1143518
1995	1146259
1998	1167281
1999	1188805
2000	1197366
2001	1207758
2002	1261654
2003	1251079
2004	1244775
2005	1177147
2006	1128687
2007	1039308
2008	927974
2009	886778
2010	1044362
2011	948902
2012	945661
2013	950308
2014	941403
2015	920171
2016	761443