Ahhhhh.. interesting. So a single incorrect answer gets amplified by an additive factor of 0.9 in the chart itself.
It's pretty easy to see that it wouldn't take too many errors of understanding (or entry) to give some pretty odd results.
But in October 2009, the most-advanced 14yos were only in 11th grade - and there were 12,000 of them.
Alternatively, if those 14yo's (assuming for a moment that this value is reasonably accurate) were taking AP coursework... then second year
post-secondary makes a fair degree of sense the following fall (since they may well have been considered non-freshman via credit accumulation).
It's still probably inaccurate, since I doubt seriously that there are
that many 14yo's taking that many AP courses and graduating 3 years ahead of their age cohort. I seriously doubt that they or their parents would misconstrue "graduate" school as "post-secondary" but you never know. It's probably where at least a few of those answers come from.
There
are people (generally quite low SES and educational attainment) who don't even really understand that there is schooling beyond college, so "graduate" to them automatically means 'high school.'
