Year Thousands of Persons 1955-01-01 19549.17 1956-01-01 20420.58 1957-01-01 20714.25 1958-01-01 20613.33 1959-01-01 21164.42 1960-01-01 21873.25 1961-01-01 22089.25 1962-01-01 22525.83 1963-01-01 23105.25 1964-01-01 23831.58 1965-01-01 24748.25 1966-01-01 25978.50 1967-01-01 26892.67 1968-01-01 27806.50 1969-01-01 29084.00 1970-01-01 29687.67 1971-01-01 29976.08 1972-01-01 31257.17 1973-01-01 32715.25 1974-01-01 33769.50 1975-01-01 33989.25 1976-01-01 35614.83 1977-01-01 37288.75 1978-01-01 39569.08 1979-01-01 41217.75 1980-01-01 42116.58 1981-01-01 43000.17 1982-01-01 43256.00 1983-01-01 44046.58 1984-01-01 45914.75 1985-01-01 47259.25 1986-01-01 48705.67 1987-01-01 50333.75 1988-01-01 51695.67 1989-01-01 53019.75 1990-01-01 53689.17 1991-01-01 53495.67 1992-01-01 54051.75 1993-01-01 54910.42 1994-01-01 56616.33 1995-01-01 57522.58 1996-01-01 58500.58 1997-01-01 59873.33 1998-01-01 60770.33 1999-01-01 62041.83 2000-01-01 63585.58 2001-01-01 63737.33 2002-01-01 63582.17 2003-01-01 64404.17 2004-01-01 64727.83 2005-01-01 65756.50 2006-01-01 66925.58 2007-01-01 67792.42 2008-01-01 67876.17 2009-01-01 66207.75 2010-01-01 65704.92 2011-01-01 65578.83