I'm reading about literacy in China, and encounter the terms 净入学率 and 毛入学率, but I'm unclear on their precise meaning:
CC-CEDICT: 净 (jìng) ... / net (income, exports etc) / ...
CC-CEDICT: 毛 (máo) ... / raw / ...
CC-CEDICT: 入学率 (rùxuélǜ) percentage of children who enter school
The above seem to be the closest relevant definition. Putting the terms into Youdao gives "net enrollment rate" and "gross enrollment rate". I have no idea what the difference here is.
Moreover this news article lists a 毛入学率 of 102.5%, which sounds mathematically impossible.
从“文盲大国”到教育大国 新中国最大程度实现了教育公平,中国青年报,2021年06月21日
Question: Precisely what do 净入学率 (~"net enrollment rate") and 毛入学率 (~"gross enrollment rate") mean?