Year	Thousands of Persons
1990-01-01	24.0
1991-01-01	24.1
1992-01-01	23.6
1993-01-01	23.9
1994-01-01	23.7
1995-01-01	24.8
1996-01-01	26.0
1997-01-01	28.4
1998-01-01	30.0
1999-01-01	30.4
2000-01-01	30.2
2001-01-01	30.6
2002-01-01	29.9
2003-01-01	32.0
2004-01-01	33.2
2005-01-01	34.4
2006-01-01	34.9
2007-01-01	34.1
2008-01-01	34.9
2009-01-01	33.9
2010-01-01	31.7
2011-01-01	31.2
2012-01-01	31.7
2013-01-01	31.0
2014-01-01	30.4
2015-01-01	29.3
2016-01-01	28.9
2017-01-01	29.0