Period	Persons
1967-01-01	2008148
1972-01-01	2318070
1977-01-01	2655036
1982-01-01	3002785
1987-01-01	3392823
1992-01-01	3881973
1997-01-01	4335991
2002-01-01	4600171
2007-01-01	4858236
2012-01-01	5172931