I love to hate on all of the glaring deficiencies of the US just as much as anyone, but it may be unwarranted in this instance.
The US is not the top of the list, but far from the bottom, being 15th out of 58.. That amazes me, considering how bruised and battered the education system is.
The American education system is underfunded, and politicized in every negative way. Then we get posts like this that attempt to bash it further.
The fact that we are in good company in regards to reading levels only speaks to the dedication of most educators. They certainly aren't in it for the money...
If I understand it correctly, Microsoft sells discounted keys to organizations as part of their Volume Licensing for businesses.
Some places on the internet take advantage of that, and sell the keys individually.