Period	Persons
1967-01-01	4996199
1972-01-01	5719315
1977-01-01	6509758
1982-01-01	7357730
1987-01-01	8299070
1992-01-01	9312915
1997-01-01	10449636
2002-01-01	11765738
2007-01-01	13317931
2012-01-01	15082831