Period	Persons
1967-01-01	4177347
1972-01-01	4812216
1977-01-01	5668178
1982-01-01	6559281
1987-01-01	8150040
1992-01-01	9759434
1997-01-01	10404259
2002-01-01	11926778
2007-01-01	13713758
2012-01-01	15906483