Year	Millions of Persons
1960-01-01	26.09
1961-01-01	26.45
1962-01-01	26.55
1963-01-01	26.61
1964-01-01	26.63
1965-01-01	26.78
1966-01-01	26.70
1967-01-01	25.83
1968-01-01	25.85
1969-01-01	26.26
1970-01-01	26.59
1971-01-01	26.71
1972-01-01	26.86
1973-01-01	27.18
1974-01-01	26.92
1975-01-01	26.25
1976-01-01	26.14
1977-01-01	26.20
1978-01-01	26.46
1979-01-01	26.97
1980-01-01	27.42
1981-01-01	27.45
1982-01-01	27.24
1983-01-01	26.99
1984-01-01	27.23
1985-01-01	27.61
1986-01-01	28.14
1987-01-01	28.53
1988-01-01	28.94
1989-01-01	29.48
1990-01-01	30.41
1991-01-01	38.71
1992-01-01	38.18
1993-01-01	37.70
1994-01-01	37.67
1995-01-01	37.80
1996-01-01	37.77
1997-01-01	37.72
1998-01-01	38.15
1999-01-01	38.72
2000-01-01	39.38
2001-01-01	39.49
2002-01-01	39.26
2003-01-01	38.92
2004-01-01	39.03
2005-01-01	38.98
2006-01-01	39.19
2007-01-01	39.86
2008-01-01	40.35
2009-01-01	40.36
2010-01-01	40.55
2011-01-01	41.10