How do demograhers project future population numbers when migration, births, and deaths don remain constant?
they can of course, by tallying the number of stats per year, also births, deaths and population… with the previous years and per year respectively, they statistically calculate the percentages of each and finally come into conclusion that this is the percentage of growth of each demograph… example: 2000 – 1,000,000 pop. 2001 – 1,001,000 pop. 2002 – 1,002,000 pop. 2003 – 1,003,000 pop. 2004 – 1,004,000 pop. 2005 – 1,006,000 pop. 2006 – 1,008,000 pop. as you can see, in the first 2001 to 2004, the rate is on 1.001 percent. but on 2005 to 2006, it became 1.002… now the as they project 2007 population, it will come into the rate of 1.002 no more 1.001 for the population, coz the rate is changing…and also, marriage rate, death rate, birth rate and so and so will affect the population rate.. everything stats are affecting each other…thats how it is…
