Year Thousands of Persons 2001-01-01 12.5 2002-01-01 9.4 2003-01-01 7.7 2004-01-01 8.1 2005-01-01 7.7 2006-01-01 7.3 2007-01-01 7.7 2008-01-01 9.5 2009-01-01 8.7 2010-01-01 8.0 2011-01-01 8.4 2012-01-01 8.4 2013-01-01 4.5 2014-01-01 5.0 2015-01-01 5.5 2016-01-01 5.8