In the 1990US Census, the population was approximately 260,000,000. In the 2000
ID: 213535 • Letter: I
Question
In the 1990US Census, the population was approximately 260,000,000. In the 2000 US Census, the population was approximately 285,000,000. During the same period, the total fertility rate was approximately 2.1 children. At this total fertility rate, what would you expect the rate of population growth to be? If this were true, what accounts for the 25,000,000 increase in the population? What effect might obesity and diabetes have in current life expectancy? In the 1990US Census, the population was approximately 260,000,000. In the 2000 US Census, the population was approximately 285,000,000. During the same period, the total fertility rate was approximately 2.1 children. At this total fertility rate, what would you expect the rate of population growth to be? If this were true, what accounts for the 25,000,000 increase in the population? What effect might obesity and diabetes have in current life expectancy?Explanation / Answer
We know the rate of population growth (in percent), PR can be given as-
PR = {100*( Ppresent - Ppast)/Ppast}/ N
Here Ppresent is 285,000,000; Ppast = 260,000,000; N= 10 years.
Now putting all the values in the equation we get
PR = {100*(285000000 - 260000000)/260000000}/10 = 0.9%.
So, the population is expectedly growing at 0.9% yearly.
There is net increase of 25,000,000 in US population over the period of 10 years because of the positive rate of population. This positive rate of population means that the birth rate of population is higher than than death rate or there are more children taking birth every year than the number of people dying every year. The high birth rate in the US is due to the high fertility rate of women in the US. As the fertility rate goes down, so does the birth rate, and when birth rate becomes lower than the death rate, we no longer see an increase in the population.
As we know total fertility rate is the number of children an average woman is expected to have in her lifetime (in her fertile age i.e. between the age of 15 and 49). The fertility in the fertile age of women is affected by the medical conditions like obesity and diabetes. Since obesity and diabetes negatively affect the fertility of the women, they will produce lower number of children and this will also reduce the birth rate of the population. Besides, obesity and diabetes also reduce the life expectancy of the people, which in turn will increase the death rate of the population. The net effect of the above two (decrease in birth rate and increase in death rate) will be a decrease in the population rate.
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