Year	Thousands of Persons
1990-01-01	13.3
1991-01-01	14.8
1992-01-01	15.1
1993-01-01	15.7
1994-01-01	14.2
1995-01-01	14.5
1996-01-01	14.6
1997-01-01	12.2
1998-01-01	12.0
1999-01-01	11.7
2000-01-01	11.7
2001-01-01	12.2
2002-01-01	12.4
2003-01-01	10.7
2004-01-01	11.3
2005-01-01	11.2
2006-01-01	11.6
2007-01-01	12.4
2008-01-01	12.0
2009-01-01	11.8
2010-01-01	11.7
2011-01-01	11.7
2012-01-01	11.8
2013-01-01	12.1
2014-01-01	12.1
2015-01-01	11.5
2016-01-01	11.2
2017-01-01	10.9