I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "Education is compulsory from the age of 7 to 13. The enrollment of boys is higher than that of girls. In 1998, the gross primary enrollment rate was 53.5%, with higher enrollment ratio for males (67.7%) compared to females (40%)."? 

What was the enrollment rate for girls in 1998