Year Thousands of Persons 1962-01-01 21303.78 1963-01-01 21321.57 1964-01-01 21362.33 1965-01-01 21496.89 1966-01-01 21503.03 1967-01-01 20800.82 1968-01-01 20802.44 1969-01-01 21151.44 1970-01-01 21459.69 1971-01-01 21571.60 1972-01-01 21288.26 1973-01-01 21349.07 1974-01-01 20941.52 1975-01-01 20282.97 1976-01-01 20094.08 1977-01-01 20103.13 1978-01-01 20238.98 1979-01-01 20505.51 1980-01-01 20617.10 1981-01-01 20385.83 1982-01-01 19978.61 1983-01-01 19663.24 1984-01-01 19640.92 1985-01-01 19741.84 1986-01-01 19875.75 1987-01-01 19942.38 1988-01-01 20901.41 1989-01-01 21155.64 1990-01-01 22080.71 1991-01-01 21331.25 1992-01-01 21087.00 1993-01-01 20840.75 1994-01-01 20688.00 1995-01-01 20575.00 1996-01-01 20333.75 1997-01-01 20212.75 1998-01-01 20461.25 1999-01-01 20237.00 2000-01-01 20243.50 2001-01-01 20202.50 2002-01-01 19879.00 2003-01-01 19578.75 2004-01-01 19518.75 2005-01-01 19963.60 2006-01-01 20335.45 2007-01-01 20745.10 2008-01-01 21032.92 2009-01-01 20815.92 2010-01-01 20891.68 2011-01-01 21403.62