Year	Thousands of Persons
1970-01-01	13750
1971-01-01	13820
1972-01-01	13810
1973-01-01	14420
1974-01-01	14250
1975-01-01	13430
1976-01-01	13440
1977-01-01	13350
1978-01-01	13220
1979-01-01	13290
1980-01-01	13630
1981-01-01	13800
1982-01-01	13740
1983-01-01	14010
1984-01-01	14330
1985-01-01	14480
1986-01-01	14390
1987-01-01	14200
1988-01-01	14500
1989-01-01	14800
1990-01-01	15010
1991-01-01	15460
1992-01-01	15650
1993-01-01	15260
1994-01-01	14920
1995-01-01	14520
1996-01-01	14420
1997-01-01	14390
1998-01-01	13780
1999-01-01	13410
2000-01-01	13180
2001-01-01	12800
2002-01-01	11990
2003-01-01	11750
2004-01-01	11470
2005-01-01	11390
2006-01-01	11600
2007-01-01	11670
2008-01-01	11480
2009-01-01	10800
2010-01-01	10580
2011-01-01	10470
2012-01-01	10300