Year	Thousands of Persons
1970-01-01	4093
1971-01-01	5016
1972-01-01	4882
1973-01-01	4365
1974-01-01	5156
1975-01-01	7929
1976-01-01	7406
1977-01-01	6991
1978-01-01	6202
1979-01-01	6137
1980-01-01	7637
1981-01-01	8273
1982-01-01	10678
1983-01-01	10717
1984-01-01	8539
1985-01-01	8312
1986-01-01	8237
1987-01-01	7425
1988-01-01	6701
1989-01-01	6528
1990-01-01	7047
1991-01-01	8628
1992-01-01	9613
1993-01-01	8940
1994-01-01	7996
1995-01-01	7404
1996-01-01	7236
1997-01-01	6739
1998-01-01	6210
1999-01-01	5880
2000-01-01	5692
2001-01-01	6801
2002-01-01	8378
2003-01-01	8774
2004-01-01	8149
2005-01-01	7591
2006-01-01	7001
2007-01-01	7078
2008-01-01	8924
2009-01-01	14265
2010-01-01	14825
2011-01-01	13747
2012-01-01	12506