What are the power output levels available on this microwave and what are they used for?

The microwave has five power levels: Low (17%) for softening ice cream, Med. Low/Defrost (33%) for soup, stew, or defrosting, Med. (55%) for stew and fish, Med. High (77%) for rice, fish, chicken, and ground meat, and High (100%) for reheating, milk, boiling water, vegetables, and beverages. You select the desired level using the POWER knob before setting the timer. (Page 13)