Period	Persons
1967-01-01	10111920
1972-01-01	11460080
1977-01-01	12891715
1982-01-01	14543585
1987-01-01	16703500
1992-01-01	19205112
1997-01-01	21805835
2002-01-01	24413795
2007-01-01	26813819
2012-01-01	29239927