Period	Persons
1967-01-01	4017946
1972-01-01	4285526
1977-01-01	4383225
1982-01-01	4673637
1987-01-01	5363069
1992-01-01	6734242
1997-01-01	8296478
2002-01-01	9045748
2007-01-01	10046967
2012-01-01	11451273