The column chart represents the difference between total amount of gorillas that were living in the other places in 1990 and 2015.
Overall, the maximum number of gorillas are noted in Uganda in 1990 to compare with other areas. However, it is seen that this data was decreased in 2015 from approximately 8500 to 7500. Moreover, the least value is seen in Gabon in 1990 which was around 1250.
In the late 20th century, Central African Republic occupied over 5000 gorillas while at the same time that Nigeria and Rwanda had around 2500 gorillas. It is seen that number of species in Nigeria slightly changed from back then to 2015. Also, this phenomenon happened to certain areas such as Cameroom and Angola which contained overall 1250 gorillas in 1990 but did not get big changes after 25 years. For Central African Republic, number of gorillas decreased significantly to approximately 4900.
