Period	Persons
1967-01-01	33774079
1972-01-01	39057780
1977-01-01	44408422
1982-01-01	49247430
1987-01-01	53993052
1992-01-01	57661001
1997-01-01	60206941
2002-01-01	63797841
2007-01-01	66076927
2012-01-01	66785001