Period	Persons
1967-01-01	25116
1972-01-01	28490
1977-01-01	30690
1982-01-01	34740
1987-01-01	42448
1992-01-01	49597
1997-01-01	54942
2002-01-01	58729
2007-01-01	57919
2012-01-01	55128