Year	Thousands of Persons
1972-01-01	13.00
1973-01-01	15.00
1974-01-01	14.00
1975-01-01	19.00
1976-01-01	16.00
1977-01-01	16.00
1978-01-01	18.00
1979-01-01	19.00
1980-01-01	18.00
1981-01-01	22.00
1982-01-01	25.00
1983-01-01	32.00
1984-01-01	28.00
1985-01-01	28.00
1986-01-01	24.00
1987-01-01	25.00
1988-01-01	33.00
1989-01-01	45.00
1990-01-01	46.00
1991-01-01	48.00
1992-01-01	50.00
1993-01-01	50.00
1994-01-01	46.00
1995-01-01	46.00
1996-01-01	50.00
1997-01-01	44.00
1998-01-01	35.00
1999-01-01	33.00
2000-01-01	35.00
2001-01-01	38.00
2002-01-01	41.00
2003-01-01	45.00
2004-01-01	45.00
2005-01-01	49.00
2006-01-01	39.00
2007-01-01	29.25
2008-01-01	29.50
2009-01-01	32.50
2010-01-01	37.00
2011-01-01	38.25