Period	Persons
1967-01-01	10154489
1972-01-01	12083159
1977-01-01	14527242
1982-01-01	17559844
1987-01-01	21138372
1992-01-01	25036941
1997-01-01	28943647
2002-01-01	33000524
2007-01-01	37752304
2012-01-01	43178141