Year	Thousands of Persons
1990-01-01	13.4
1991-01-01	12.9
1992-01-01	14.3
1993-01-01	16.4
1994-01-01	18.0
1995-01-01	19.2
1996-01-01	18.6
1997-01-01	20.1
1998-01-01	21.8
1999-01-01	22.6
2000-01-01	22.5
2001-01-01	23.3
2002-01-01	22.9
2003-01-01	23.2
2004-01-01	24.5
2005-01-01	25.0
2006-01-01	25.1
2007-01-01	23.9
2008-01-01	23.6
2009-01-01	23.3
2010-01-01	23.9
2011-01-01	24.4
2012-01-01	24.8
2013-01-01	25.5
2014-01-01	26.0
2015-01-01	26.5
2016-01-01	26.0
2017-01-01	25.4