Year	Thousands of Persons
1990-01-01	5.5
1991-01-01	5.1
1992-01-01	5.1
1993-01-01	5.1
1994-01-01	5.1
1995-01-01	5.3
1996-01-01	5.9
1997-01-01	6.3
1998-01-01	6.6
1999-01-01	7.1
2000-01-01	7.4
2001-01-01	6.9
2002-01-01	6.3
2003-01-01	6.3
2004-01-01	6.6
2005-01-01	6.1
2006-01-01	5.7
2007-01-01	5.6
2008-01-01	5.2
2009-01-01	4.4
2010-01-01	3.8
2011-01-01	3.6
2012-01-01	3.6
2013-01-01	3.5
2014-01-01	3.3
2015-01-01	3.2
2016-01-01	3.0
2017-01-01	3.0