the proportion who say...句子剖析

Accordingto the report’s key findings, “the proportion who say they ‘hardly ever’ read for fun has gone from 8 percent of 13-year-oldsand 9 percent of 17-year-olds in 1984 to 22 percent and 27 percent respectivelytoday.” 2018年高考考试II卷。

请教各位老师，这个句子怎么样剖析？

1.“theproportion has gone 为句子主句。2. who say they ‘hardly ever’ read forfun为定语从句修饰the proportion。问题是proportion在从句中不做任何成分？

2）同位语从句：the proportion （that） （that ）they hardly ever read for fun. 那样这个who say做插入语剖析吗？

Teenswho 'never' or 'hardly ever' read for fun has gone from 8 percent to 22 percentin 10 years, according to a Common Sense Media report. What can parents do tohelp reverse the drop? 这段是文章的引言内容，所以可以看出以下直接引语中 who 前省略了of teens。

Accordingto the report’s key findings, “the proportion of teens who say they ‘never’ or‘hardly ever’ read for fun has gone from 8 percent of 13-year-olds and 9percent of 17-year-olds in 1984 to 22 percent and 27 percent respectivelytoday.”

而通过网友这段内容的下一段，也可得知如此判断有理有据：Themost dramatic drop is shown in teen reading habits, with the rate of teenssaying they read "often" dropping from 64 percent in 1984 to just 19percent in 2012. Amongthose ages 6-17, the proportion of "daily" readers is still estimatedaround 34 percent.