The bar chart illustrates the number of gorilla populations in the wild in seven countries in Africa in 1990 and 2015.
Overall, it is noticeable that Uganda had the highest populations of gorillas in both years, while the lowest numbers were seen in Gabon. Three countries (Uganda, Central African Republic, Rwanda) witnessed a decrease in the populations, whereas the other four countries (Nigeria, Cameroon, Angola, Gabon) remained relatively the same throughout the period.
In 1990, Uganda had the highest number of gorillas compared to the other countries, at approximately 9,000. However, the number showed a significant decline, reaching 7,500 by 2015. The Central African Republic followed a similar downward trend, in which the gorilla populations decreased by 1,000, falling to 4,500 over a 25-year period. Likewise, the number of gorillas in Rwanda also experienced a notable decline, with the population in 1990 (2,500) more than twice that in 2015 (1,000).
In contrast, the estimated populations of gorillas in Nigeria remained unchanged, accounting for approximately 2,500 in 1990 and 2015. Both Cameroon and Angola also saw a similar number of gorillas, at 1,250 in both years. The populations in Gabon showed the lowest number at around 1,000 in 1990 and 2015.