Without assuming too much, I'm not certain when you went to school, based on those numbers it seems a while ago.
2013-2014, average in-state tuition for 4-year public universities is just over 5,000 per semester, and that DOESN'T include housing, meals, books and other incidentals - it assumes you only pay for classes, nothing else.
Wyoming was the lowest average in 2013-14, at $4,404 for the year (2202 per semester), and under $9,000 when you include housing and meal plan - not bad, really.
Anymore, even with Pell, state grants and federal subsidized loans, students still have to come up with 1,000-3,000 per semester. So, that's where the unsubsidized and parent plus loans come in.
Source - my own institutional research at a community college for the last two years.
For comparison, U of T in Ontario comes to around $6,000 p.a., or $13,000 for Engineering.
When my province came out of what we call the Révolution tranquille (Quiet Revolution), we had one of the lowest postsecondary education population rate in Canada. By creating a bunch of public universities with extremely low tuition fee, we have a whole different picture 40 years later with a well educated population.