Using two-dimensional array with enumerated types in C

A demographic study of the metropolitan area around Dogpatch divided it into three regions (urban, suburban, and exurban) and published the following table showing the annual migration from one region to another (the numbers represent percentages);

Urban Suburban Exurban
Urban 1.1 0.3 0.7
Suburban 0.1 1.2 0.3
Exurban 0.2 0.6 1.3

For example, 0.3 percent of the urbanites move to the suburbs each year. Using a two-dimensional array with an enumerated type of the indices to store this table, write a program to determine the population of each region after 10,20,30,40, and 50 years. Assume that the current population of the urban, suburban, and exurban regions are 2.1, 1.4, and 0.9 million, respectively.