Amazing "By 1825, the majority of Cherokees could read and write in their newly developed orthography.[5]". It even has a reference so it must be true.
Around the same time, Christian missionaries introduced writing (using an adapted Latin alphabet) to Hawai`i. Within ten years nearly the entire population (I would guess with the exception of older people) was literate. Mark Twain remarked on Hawai`ian literacy a few decades later.