Year	Thousands of Persons
1970-01-01	19083
1971-01-01	19016
1972-01-01	18710
1973-01-01	18874
1974-01-01	19284
1975-01-01	19395
1976-01-01	19504
1977-01-01	19668
1978-01-01	19725
1979-01-01	19932
1980-01-01	20195
1981-01-01	20279
1982-01-01	20246
1983-01-01	20320
1984-01-01	20392
1985-01-01	20492
1986-01-01	20614
1987-01-01	20591
1988-01-01	20868
1989-01-01	20773
1990-01-01	21080
1991-01-01	21364
1992-01-01	21233
1993-01-01	21091
1994-01-01	20697
1995-01-01	20555
1996-01-01	20615
1997-01-01	20643
1998-01-01	20827
1999-01-01	21045
2000-01-01	21358
2001-01-01	21720
2002-01-01	21994
2003-01-01	22020
2004-01-01	22124
2005-01-01	22290
2006-01-01	22721
2007-01-01	22953
2008-01-01	23144
2009-01-01	22760
2010-01-01	22597
2011-01-01	22712
2012-01-01	22620