farrocks:
we most certainly can (and should).Their secret is that they don’t have a age gap.
that’s all there is to it…. (actually they have a slightly reverse problem of too many boys, for the exact same reason that the non chassidic have to many girls.)
but i won’t bore you with the details.
Just remember this phrase
Age 22 will save 1000 girls
Age 23 will ensure another 1000 older single girls in the next decade or so….