Period	Persons
1967-01-01	12405366
1972-01-01	14504939
1977-01-01	17017107
1982-01-01	19898033
1987-01-01	23218477
1992-01-01	27236099
1997-01-01	31586039
2002-01-01	35806497
2007-01-01	41119693
2012-01-01	47783107