Period	Persons
1967-01-01	5767478
1972-01-01	6828765
1977-01-01	8088148
1982-01-01	9613572
1987-01-01	11374437
1992-01-01	13187960
1997-01-01	15168523
2002-01-01	16994676
2007-01-01	19561477
2012-01-01	22399254