Spain also has the lowest fertility rate in Europe at 1.28. Not sure how much apartment living is cause or effect on that but it's a grim number. Every generation is only 60% the size of the one that came before it.
This is slightly aside, but the concerns over fertility rates in the first world really seem REALLY misplaced to me. Population growth concerns are easily mitigated with immigration which will stay in demand until the rest of the worlds fertility rates catch up(40+ years), and the population growth concerns themselves are a reflection of an outdated (or soon to be outdated) economic model that we should probably focu…
importing large groups of people sometimes works; we did it pretty well in America because we had so much room to grow. transportation and communication were also much harder, so it was less easy for people to maintain ties to their former country and family there; they adapted a little more, though ethnic ghettos were still a problem.
it's not an intractable problem but saying "just get immigrants bro" isn't really a good solution. we are sometimes biased in the US because we are selective (too much so, I think). we bring in the best from high-population areas like Africa and India and we see benefits for that. on the other hand, while migrant working and a moderate level of illegal immigration are fine and even economically beneficial, it would be silly to deny that the current levels are causing severe problems. when you lose that selectivity and control, things don't turn out so well. and to import enough people to make up for falling birthrates we would have to broaden our horizons beyond skilled workers.