Year Thousands of Persons 1956-01-01 11360.00 1957-01-01 11527.00 1958-01-01 11729.00 1959-01-01 11607.00 1960-01-01 11650.00 1961-01-01 11672.00 1962-01-01 11742.00 1963-01-01 11822.00 1964-01-01 11908.00 1965-01-01 12010.00 1966-01-01 12117.00 1967-01-01 12238.00 1968-01-01 12353.00 1969-01-01 12426.00 1970-01-01 12590.00 1971-01-01 12723.00 1972-01-01 12652.00 1973-01-01 12932.00 1974-01-01 13074.00 1975-01-01 13033.00 1976-01-01 13078.00 1977-01-01 13283.50 1978-01-01 13322.78 1979-01-01 13383.38 1980-01-01 13427.73 1981-01-01 13479.90 1982-01-01 13643.18 1983-01-01 13816.05 1984-01-01 13912.33 1985-01-01 14009.10 1986-01-01 14183.93 1987-01-01 14725.78 1988-01-01 15110.05 1989-01-01 15270.68 1990-01-01 15465.40 1991-01-01 15602.25 1992-01-01 15705.73 1993-01-01 15892.58 1994-01-01 16087.73 1995-01-01 16227.60 1996-01-01 16517.78 1997-01-01 16809.65 1998-01-01 17080.98 1999-01-01 17412.05 2000-01-01 18002.28 2001-01-01 18050.70 2002-01-01 18785.62 2003-01-01 19538.15 2004-01-01 20184.45 2005-01-01 20885.72 2006-01-01 21584.78 2007-01-01 22189.90 2008-01-01 22848.25 2009-01-01 23037.48 2010-01-01 23088.88 2011-01-01 23103.58