Period	Persons
1967-01-01	67682
1972-01-01	71737
1977-01-01	73411
1982-01-01	75168
1987-01-01	72368
1992-01-01	70978
1997-01-01	70756
2002-01-01	69806
2007-01-01	70795
2012-01-01	71684