www.bit.ly/17D5Zhz
www.bit.ly/1noXIaQ
In the first link this shows that the better literacy the people have the better the jobs the people can get. Which in return goes back to the country's economy. That is why it is important to have an education so you can get a better job and have a better life.
In the second link it is similar but this shows that the more of your population you have engaged in work the more you country earns which is obvious. That is why countries care if they have a high unemployment rate.