My wife's family is huge, or rather would have been if it were not for the various diseases and the Japanese occupation. Her mother was 13 of 14 kids (only 3 remain alive) her father was 15 of 18 kids! there are only 2 kids left alive! My wife only has a brother and sister and less cousins than I do!
The number of childern families are having here seems to have leveled off at 3 per family some people are now saying that this is because people are more conservative! My personal theory is that you can't get more than 5 on a scooter at once!
The population isn't going to slow down with out education and possibly an alien invasion!