Year	Thousands of Persons
1990-01-01	16.7
1991-01-01	16.8
1992-01-01	17.3
1993-01-01	17.6
1994-01-01	17.6
1995-01-01	17.7
1996-01-01	18.6
1997-01-01	18.5
1998-01-01	18.0
1999-01-01	18.7
2000-01-01	20.2
2001-01-01	20.6
2002-01-01	21.4
2003-01-01	27.2
2004-01-01	28.5
2005-01-01	29.5
2006-01-01	29.7
2007-01-01	30.5
2008-01-01	31.4
2009-01-01	32.6
2010-01-01	34.3
2011-01-01	36.0
2012-01-01	37.6
2013-01-01	38.6
2014-01-01	37.5
2015-01-01	36.7
2016-01-01	37.0
2017-01-01	36.4