Year Thousands of Persons 1955-01-01 20548.08 1956-01-01 21460.83 1957-01-01 21732.00 1958-01-01 22117.33 1959-01-01 22484.00 1960-01-01 23239.17 1961-01-01 23805.92 1962-01-01 24014.33 1963-01-01 24704.00 1964-01-01 25412.08 1965-01-01 26200.08 1966-01-01 27304.00 1967-01-01 28361.00 1968-01-01 29203.83 1969-01-01 30512.08 1970-01-01 31543.00 1971-01-01 32202.75 1972-01-01 33479.75 1973-01-01 34804.92 1974-01-01 36211.08 1975-01-01 37475.75 1976-01-01 38983.75 1977-01-01 40613.33 1978-01-01 42630.33 1979-01-01 44236.17 1980-01-01 45486.58 1981-01-01 46695.83 1982-01-01 47754.75 1983-01-01 48503.33 1984-01-01 49709.17 1985-01-01 51050.17 1986-01-01 52412.92 1987-01-01 53658.00 1988-01-01 54741.75 1989-01-01 56022.75 1990-01-01 56829.17 1991-01-01 57178.17 1992-01-01 58141.33 1993-01-01 58795.33 1994-01-01 60245.25 1995-01-01 60943.83 1996-01-01 61856.83 1997-01-01 63035.67 1998-01-01 63714.33 1999-01-01 64855.25 2000-01-01 66302.67 2001-01-01 66848.33 2002-01-01 67363.17 2003-01-01 68272.25 2004-01-01 68421.42 2005-01-01 69287.83 2006-01-01 70172.42 2007-01-01 70987.92 2008-01-01 71767.08 2009-01-01 72019.17 2010-01-01 71904.00 2011-01-01 71642.08