Year	Thousands of Persons
1990-01-01	3.6
1991-01-01	3.3
1992-01-01	3.3
1993-01-01	3.4
1994-01-01	3.7
1995-01-01	3.8
1996-01-01	3.7
1997-01-01	3.7
1998-01-01	3.9
1999-01-01	3.6
2000-01-01	3.5
2001-01-01	3.6
2002-01-01	3.4
2003-01-01	3.0
2004-01-01	3.0
2005-01-01	3.4
2006-01-01	3.3
2007-01-01	3.3
2008-01-01	3.2
2009-01-01	3.2
2010-01-01	3.3
2011-01-01	2.9
2012-01-01	2.7
2013-01-01	2.5
2014-01-01	2.4
2015-01-01	2.4
2016-01-01	2.4
2017-01-01	2.4