Period	Persons
1967-01-01	6072270
1972-01-01	6952383
1977-01-01	8031589
1982-01-01	9220693
1987-01-01	10563491
1992-01-01	12263899
1997-01-01	14329239
2002-01-01	16736029
2007-01-01	19371023
2012-01-01	22293914