I've gotten comments suggesting that if there's ANYONE in a city or country that doesn't reject a missionary, then it's not outright rejection.
That makes some sense, but it still bothers me that if a missionary spends a year in a country where one person accepts Christ, when he could have gone somewhere where acceptance would have been much higher, then the overall effect is Satan wins more souls.
So is it more important to allocate missionaries evenly throughout the world, or is it more important to put them where they win the most souls? Tough question if you're a Christian.
I think the important part is to be true to the commission and "go ye." Whether one goes into the neighbor's house next door, pitches a tent in the Australian Outback, or wherever, I don't think God is necessarily concerned with numbers the way we are. I don't want to imply that numbers don't matter at all because every soul that believes glorifies God and he deserves all the glory into infinity... it's just that it's a human thing to get caught up in numbers and vainglory for the sake of pride and so on.