In the 20th century many states restricted the capacity of their populations to emigrate. Most famously, Churchill described the variety of emigration, financial and political restrictions in Central ...
In the movie Deer Hunter we can see Russian-Americans sing the song "Katyusha" during a wedding. One can clearly see that this song fits well into the movie's themes (the groom on this wedding is ...
By natural, I mean as a result of births and deaths, rather than emmigration and immigration. I can find data for the total population size (e.g. here) but not for natural population moves and I ...