Year Millions of Persons 1963-01-01 7.56 1964-01-01 7.70 1965-01-01 8.11 1966-01-01 8.33 1967-01-01 8.62 1968-01-01 9.06 1969-01-01 9.29 1970-01-01 9.62 1971-01-01 9.95 1972-01-01 10.38 1973-01-01 10.94 1974-01-01 11.42 1975-01-01 11.69 1976-01-01 12.41 1977-01-01 12.81 1978-01-01 13.41 1979-01-01 13.60 1980-01-01 13.68 1981-01-01 14.02 1982-01-01 14.38 1983-01-01 14.51 1984-01-01 14.43 1985-01-01 14.97 1986-01-01 15.51 1987-01-01 16.35 1988-01-01 16.87 1989-01-01 17.56 1990-01-01 18.09 1991-01-01 18.65 1992-01-01 19.01 1993-01-01 19.23 1994-01-01 19.85 1995-01-01 20.41 1996-01-01 20.85 1997-01-01 21.21 1998-01-01 19.94 1999-01-01 20.29 2000-01-01 21.16 2001-01-01 21.57 2002-01-01 22.17 2003-01-01 22.14 2004-01-01 22.56 2005-01-01 22.86 2006-01-01 23.15 2007-01-01 23.43 2008-01-01 23.58 2009-01-01 23.51 2010-01-01 23.83 2011-01-01 24.24