Answer based on context:

According to the American Community Survey survey, Dorchester has a large under 25 population with 38.1% or 43,472 people and 33,162 (29.1% of the total population) of them under the age of 19 years old.  Between the ages of 25 to 64 years old there are 59,788 or 52.6%  people and 10,715 people or 9.3% are over the age of 65 years old. In Dorchester, approximately 61.9% or 70,503 people are over the age of 25, 23.5% or 16,582 people do not have a high school diploma or GED , 30.5% or 21,479 have a diploma or GED, 18.5% or 13,045 people have completed some college, and 27.5% or 19,397 people have a Academic degree.

How many more people in Dorchester have a GED diploma than do not?
4897