Simplify the following text for a Grade 8 native English-speaking person.
Original: About 66 % of all Haitians work in the agricultural sector , which consists mainly of small-scale subsistence farming , but this activity makes up only 30 % of the GDP .
Simplified: About 66 % of all Haitians work in the agricultural sector . Most of them do small-scale subsistence farming , but this activity makes up only 30 % of the GDP .