It's not a particularly good advertisement for the school (did somebody get to the sig before me?). It's interesting how these posteriorly obtained numbers are always so nice and round.
The absolute best thing you could do is to get out of your head the idea that there's a single number that represents "the kanji I know". For some kanji you might only recognise one or two words that use them and that will be enough (e.g. 挨拶 is a useful word, the kanji in it are not widely used otherwise). For others you might know how to write the kanji by hand, read a wide range of words that use it, and make a fairly good educated guess at how it is read/what meaning it lends in unfamiliar words.
Your personal interests and reasons for learning should guide what kanji/vocabulary you learn and other things like whether you put much time into learning to write by hand.