Year	Thousands of Persons
1970-01-01	8490
1971-01-01	7840
1972-01-01	7310
1973-01-01	6810
1974-01-01	6540
1975-01-01	6380
1976-01-01	6210
1977-01-01	6110
1978-01-01	6100
1979-01-01	5860
1980-01-01	5510
1981-01-01	5330
1982-01-01	5250
1983-01-01	5060
1984-01-01	4860
1985-01-01	4820
1986-01-01	4700
1987-01-01	4640
1988-01-01	4480
1989-01-01	4390
1990-01-01	4270
1991-01-01	4030
1992-01-01	3910
1993-01-01	3650
1994-01-01	3550
1995-01-01	3510
1996-01-01	3390
1997-01-01	3320
1998-01-01	3250
1999-01-01	3160
2000-01-01	3070
2001-01-01	2970
2002-01-01	2810
2003-01-01	2780
2004-01-01	2710
2005-01-01	2670
2006-01-01	2580
2007-01-01	2590
2008-01-01	2560
2009-01-01	2500
2010-01-01	2420
2011-01-01	2370
2012-01-01	2270