Period	Persons
1967-01-01	9036236
1972-01-01	9929560
1977-01-01	10729757
1982-01-01	11543263
1987-01-01	12541298
1992-01-01	13706485
1997-01-01	14872458
2002-01-01	15819522
2007-01-01	16668892
2012-01-01	17464814