Year	Thousands of Persons
1990-01-01	7.9
1991-01-01	7.7
1992-01-01	7.9
1993-01-01	7.9
1994-01-01	8.1
1995-01-01	8.6
1996-01-01	9.3
1997-01-01	9.4
1998-01-01	8.9
1999-01-01	9.1
2000-01-01	9.7
2001-01-01	10.1
2002-01-01	10.9
2003-01-01	12.6
2004-01-01	13.1
2005-01-01	13.4
2006-01-01	13.8
2007-01-01	14.2
2008-01-01	14.7
2009-01-01	15.2
2010-01-01	16.1
2011-01-01	16.8
2012-01-01	17.4
2013-01-01	18.0
2014-01-01	16.7
2015-01-01	17.0
2016-01-01	17.6
2017-01-01	17.7