World Population Today: "The world population has grown tremendously over the past two thousand years. In 1999, the world population passed the six billion mark. Latest official current world population estimate, for mid-year 2013, is estimated at 7,095,217,980. The linked chart shows past world population data back to the year one and future world population projections through the year 2083." Image Source: http://efergy.com/blog/world-population-2013-what-do-we-now-know/
Agriculture town ~ est age btw, 6 to 21 yrs, require proper "social re-engineering" to ensure a consistent profiling/distribution of individuals by age group whom choose to migrate to the various towns.
World Population Will Soar Higher Than Predicted [Graphic by Hana Ševčíková and Jen Christiansen for Scientific American; SOURCES: “World Population Stabilization Unlikely this Centruy” By Patrck Gerland et al., in Science Express. Published online September 18, 2014 (2014 projections); “The End of World Population Growth,” By Wolgang Lutz et al., in Nature, Vol. 412; August 2, 2001 (2001 projections)]