Year	Thousands of Persons
1955-01-01	17398.33
1956-01-01	17645.00
1957-01-01	17975.83
1958-01-01	18015.00
1959-01-01	18079.17
1960-01-01	18377.50
1961-01-01	18538.33
1962-01-01	18611.67
1963-01-01	18617.50
1964-01-01	18782.50
1965-01-01	19034.17
1966-01-01	19493.33
1967-01-01	19905.00
1968-01-01	20029.17
1969-01-01	20072.50
1970-01-01	20238.33
1971-01-01	20045.83
1972-01-01	19902.50
1973-01-01	20480.00
1974-01-01	19996.67
1975-01-01	19869.17
1976-01-01	20100.00
1977-01-01	20702.50
1978-01-01	21255.83
1979-01-01	21597.50
1980-01-01	21852.50
1981-01-01	22091.67
1982-01-01	22523.33
1983-01-01	23242.50
1984-01-01	23466.67
1985-01-01	23670.83
1986-01-01	23946.67
1987-01-01	24285.83
1988-01-01	24725.83
1989-01-01	25330.83
1990-01-01	25930.83
1991-01-01	26512.50
1992-01-01	26790.00
1993-01-01	26805.00
1994-01-01	26935.83
1995-01-01	27005.00
1996-01-01	27188.33
1997-01-01	27597.50
1998-01-01	27670.00
1999-01-01	27552.50
2000-01-01	27525.00
2001-01-01	27603.33
2002-01-01	27335.00
2003-01-01	27326.67
2004-01-01	27369.17
2005-01-01	27495.83
2006-01-01	27587.50
2007-01-01	27624.17
2008-01-01	27622.50
2009-01-01	27705.83
2010-01-01	27682.50
2011-01-01	26923.33