Year	Thousands of Persons
1971-01-01	9120
1972-01-01	9327
1973-01-01	9651
1974-01-01	9944
1975-01-01	10063
1976-01-01	10422
1977-01-01	10712
1978-01-01	10981
1979-01-01	11205
1980-01-01	11410
1981-01-01	11554
1982-01-01	12610
1983-01-01	12803
1984-01-01	12923
1985-01-01	13227
1986-01-01	13609
1987-01-01	13774
1988-01-01	13958
1989-01-01	14285
1990-01-01	14394
1991-01-01	14467
1992-01-01	14717
1993-01-01	14905
1994-01-01	15069
1995-01-01	15420
1996-01-01	15655
1997-01-01	15690
1998-01-01	15924
1999-01-01	16228
2000-01-01	16796
2001-01-01	17066
2002-01-01	17377
2003-01-01	17528
2004-01-01	17746
2005-01-01	17985
2006-01-01	18128
2007-01-01	18579
2008-01-01	19176
2009-01-01	19161
2010-01-01	19336
2011-01-01	19405
2012-01-01	19571