This is slightly off OP but I hope relevant to the rather critical post about those of us who have over populated the planet.
I confess to having had three children, one of whom was unplanned. We were using every kind of contraception known to person kind, we're not unemployed or uneducated and we certainly aren't toffs but there we go, we had an unplanned pregnancy. I was 37 years old so ought to have known better, I thought I did and can well remember waking at 3am and suddenly knowing the reason I'd felt so tired recently was because I could be pregnant, I'd missed a period. I'd also drunk a glass of whiskey on arrival at my parent's in laws home earlier that evening - so had that huge guilt to deal with as well. The baby will be 29 very soon, is much loved and brought a huge amount of joy with her, so we've absolutely no regrets about over populating this small island. She is a primary school teacher, seems to love the children and they seem to enjoy her so hopefully she's a contributing member of this land.
I'm one of three, my youngest sister was mum and dad's surprise baby when mum was 38. Evidently mum, like me, was shocked and unnerved but got on with it. My sister has been an absolute joy since the day she arrived, she's 58 now. She hasn't been blessed with children, so balances out our family in the way Elegran describes above.
I've just heard on the news that another boat has sunk off Libya with a large loss of life. I heard a truck driver on radio 2 earlier expressing frustration at the £2000 fine he's been given after a couple of men were found in the trunk of his coach. They'd forced the padlock off and hidden in there whilst he was distracted by their pals at the front of the coach. What a mess it all is. Why can't the EU get its act together, have its various governments work together to assess people as they arrive, wherever they arrive. Some of the would be migrants will be genuine asylum seekers, others won't - let's work cooperatively to sort this out. Apologies for long post and posting on separate topics.