Year	Thousands of Persons
1990-01-01	4.5
1991-01-01	4.3
1992-01-01	4.2
1993-01-01	3.9
1994-01-01	4.0
1995-01-01	4.0
1996-01-01	4.2
1997-01-01	4.2
1998-01-01	4.1
1999-01-01	4.6
2000-01-01	4.9
2001-01-01	4.7
2002-01-01	4.4
2003-01-01	4.6
2004-01-01	4.7
2005-01-01	4.2
2006-01-01	3.9
2007-01-01	3.9
2008-01-01	3.5
2009-01-01	2.7
2010-01-01	2.3
2011-01-01	2.0
2012-01-01	2.1
2013-01-01	1.9
2014-01-01	1.8
2015-01-01	1.6
2016-01-01	1.5
2017-01-01	1.4