explain how As education requirement increases this leads to unemployment due to lack of supply using teachers an example... before u needed 3 years of collage, today u need 6 years

Please help me understand using stastics how back in the day unemployment was low due to low education requirments and now when education requirment increased so did unemployment h

If you dont get what im asking for please let me know :)

please answer this in paragraph format, cuz its way easier for me to read and understand, thanks so much