1950: The country was in stage 2 of the Demographic Transition Model. This is displayed in the wide base representing the large number of kids also the tiny peak representing a small number of elders. Some factors seen in Stage 2 include high growth in population, more basic farming, and the beginning industrial and medical revolutions. Families are larger and more children typically worked. Their is also more girls than boys.
1975: during this time the countries DTM was also in stage 2. the pyramid showed a wide base and a small peak. this is due to better food, medical, and industrial recourses. there is more children then adult so families are bigger. the children also probably work to help their families get more money. their was also more males than females during this time.
2000: during this time they have began to enter into stage 4 of the DTM. their birth rate has slowed down. they are not yet classified as a stage 5 yet though because their birth rate is still higher than death rate. Stage four is caused by family planning due to women becoming more educated and starting their own jobs. People are now having less kids because of the money it cost to have one. they also have better health care so they don't need to worry about their children dying. during this time there is more males than females.
2015: the DTM is still stage 4 during this time. but the birth rate has increased a little bit due to so many women at the child bearing age. they are slowly still increasing and haven't decreased at all. many of the reason to this are like what went on in 2000
2050: during this time we are still in stage 4 and could be considered going into stage 5, the birth rate has lowered and the highest age on there are in the 30s. this shows that eventually people will start having less and less kids
2099: they have reached stage 5 the birth rate is lower than the death rate. this is when the might need to find ways to bring up the population.