My Tiny High School

I just called my hometown high school because even though I have been going to college for 26 years and have been in and out of my current institution at least 5 times, they need my HS transcripts again! Anyway, while looking up their number on the internet I found out that they currently have 625 students. Woo, imagine that. They had 500 when I graduated in 1983. Town has grown a lot since I left. High School has completely remodeled and grown since I left. Student body? Not so much. Wonder why that is?