Simplify the following text for a Grade 14 native English-speaking person.
Original: Ron Joyce 's very fast expansion of the Tim Hortons business brought about two major changes in the coffee and doughnut restaurant market : independent doughnut shops in Canada were almost wiped out , and Canada 's per person ratio of doughnut shops rose past those of all other countries .
Simplified: Ron Joyce 's aggressive expansion of the Tim Hortons business resulted in one major change in the coffee and doughnut restaurant market : Canada 's per-capita ratio of doughnut shops surpassed those of all other countries .