Period	People
1962-01-01	3125528
1967-01-01	3534910
1972-01-01	6279500
1977-01-01	5895533
1982-01-01	5083345
1987-01-01	7325573
1992-01-01	11778934
1997-01-01	13486532
2002-01-01	15799328
2007-01-01	16319628
2012-01-01	11735448