Real time statistics for current population of any country. Real time data on population, births, deaths, net migration and population growth.
This site shows various demographic statistics for every country including some based on projections in demographic trends in the given country. If the current trends hold (which they won't, but that is still an interesting measure), the entire Japanese population will disappear in 1,000 years according to this Global Post article.
I believe India has more men than women because sometimes when women can't have a son for their first or second child, the men would beat the women to death, or in some instances women are captured and sold for wives, and they may commit suicide they are so depressed. Also, some pregnant women find out their baby is a girl, they would aport or abandon her because sons are apparently more important and successful because they would stay home and take care of their parents when they are elderly and they would carry on the families name. -rt
This is fantastic - have a look at various countries and their 'rate' of growth