Year	Millions of Persons
1960-01-01	17.91
1961-01-01	18.27
1962-01-01	18.61
1963-01-01	18.96
1964-01-01	19.33
1965-01-01	19.68
1966-01-01	20.05
1967-01-01	20.41
1968-01-01	20.73
1969-01-01	21.03
1970-01-01	21.32
1971-01-01	21.96
1972-01-01	22.22
1973-01-01	22.49
1974-01-01	22.81
1975-01-01	23.14
1976-01-01	23.45
1977-01-01	23.73
1978-01-01	23.96
1979-01-01	24.20
1980-01-01	24.52
1981-01-01	24.82
1982-01-01	25.12
1983-01-01	25.37
1984-01-01	25.61
1985-01-01	25.84
1986-01-01	26.10
1987-01-01	26.45
1988-01-01	26.79
1989-01-01	27.28
1990-01-01	27.69
1991-01-01	28.04
1992-01-01	28.37
1993-01-01	28.68
1994-01-01	29.00
1995-01-01	29.30
1996-01-01	29.61
1997-01-01	29.91
1998-01-01	30.16
1999-01-01	30.40
2000-01-01	30.69
2001-01-01	31.02
2002-01-01	31.35
2003-01-01	31.64
2004-01-01	31.94
2005-01-01	32.25
2006-01-01	32.58
2007-01-01	32.93
2008-01-01	33.32
2009-01-01	33.73
2010-01-01	34.13
2011-01-01	34.48