Year	Thousands of Persons
1970-01-01	26080
1971-01-01	25182
1972-01-01	25827
1973-01-01	27258
1974-01-01	27213
1975-01-01	25301
1976-01-01	26310
1977-01-01	27343
1978-01-01	28809
1979-01-01	29797
1980-01-01	29136
1981-01-01	28995
1982-01-01	27070
1983-01-01	25895
1984-01-01	27372
1985-01-01	27605
1986-01-01	27956
1987-01-01	28087
1988-01-01	28532
1989-01-01	28932
1990-01-01	28756
1991-01-01	27493
1992-01-01	26979
1993-01-01	26866
1994-01-01	27475
1995-01-01	27978
1996-01-01	28270
1997-01-01	28973
1998-01-01	29210
1999-01-01	29033
2000-01-01	30050
2001-01-01	29127
2002-01-01	27716
2003-01-01	27565
2004-01-01	27791
2005-01-01	28074
2006-01-01	28813
2007-01-01	28894
2008-01-01	27697
2009-01-01	24611
2010-01-01	23889
2011-01-01	24192
2012-01-01	24607