Period	Persons
1967-01-01	5171093
1972-01-01	6342159
1977-01-01	8236583
1982-01-01	11172632
1987-01-01	14528398
1992-01-01	17263613
1997-01-01	19060850
2002-01-01	21825217
2007-01-01	25915624
2012-01-01	28287855