US is above on all counts.

> On average across OECD countries, USD 11 900 is spent per primary school student per year. For higher levels of education, spending increases: USD 13 300 is spent per secondary school student, while USD 20 500 is spent per tertiary student. This reflects that fact that higher levels of education often require teachers to have more advanced qualifications and specialised knowledge, which are usually accompanied by higher salaries.

Don't confuse your misunderstanding of their comment as anything else.

Further, the $ amount spent per student in the US has almost universally never gone done since the 1950s. It has always gone up. Don't even need to include tertiary education in this calculation.