Year	Thousands of Persons
1990-01-01	2.0
1991-01-01	2.1
1992-01-01	2.0
1993-01-01	2.1
1994-01-01	2.3
1995-01-01	2.1
1996-01-01	1.8
1997-01-01	1.8
1998-01-01	1.7
1999-01-01	1.6
2000-01-01	1.5
2001-01-01	1.7
2002-01-01	1.6
2003-01-01	1.7
2004-01-01	1.7
2005-01-01	1.7
2006-01-01	1.7
2007-01-01	1.7
2008-01-01	1.7
2009-01-01	1.6
2010-01-01	1.5
2011-01-01	1.5
2012-01-01	1.5
2013-01-01	1.4
2014-01-01	1.4
2015-01-01	1.3
2016-01-01	1.3
2017-01-01	1.2