From the data,
a. Calculate the population of Gilder for each 10-year period by filling in the Population (NO) and Population (Nt) columns in the data table. Use this formula to do your calculations:
Population size:
Nt = No + (B + I) – (D + E)
initial population = 20,000,000
b. Which of the following might reasonably explain the change in Gilder’s population? Explain your choice of answer(s).
• prosperous economy only
• improved health care only
• prosperous economy along with improved health care
• neither a prosperous economy nor improved health care


Year

Births

Deaths

Immigrants

Emigrants

Population (No)

Population (Nt)

10

1,400,000

600,000

40,000

20,000

20,000,000

20,820,000

20

1,600,000

500,000

100,000

20,000

20,820,000

30

2,000,000

400,000

150,000

15,000

40

2,300,000

350,000

170,000

12,000

50

2,500,000

350,000

200,000

10,000