10/16/19-crude b and d, rni, nmr

In yesterday's class, we talked about the crude birth rate and the crude death rate.  I learned that the crude birth rate is the number of births per thousand of the population, and the crude death rate is the number of deaths per thousand of the population.  I also learned that the rate of natural increase (RNI) is the annual natural growth (or decrease) of the population in percentage form.  This is found by subtracting the deaths from the births, typically there are more births than deaths but not all the time.  We also talked about the net migration rate and what push and pull factors there were for people that were thinking about migrating.  The net migration rate is the difference between the number of people that enter and leave a country per year.  Immigration is an excess number of people leaving a country and going to a new one.  This is written as a positive number.  Emigration is an excess number of people leaving their country.  This is written as a negative number.