To Put in a Good Word, Put in a Good Read

	Reads "lots"	Reads "somewhat"	Reads "not much"
5	9.53	6.884	5.646
7	12.474	6.938	8.22
9	12.353	10.673	6.507
11	17.867	11.836	9.135
13	19.608	14.976	11.132
15	21.994	17.227	11.2

Age

Average Vocabulary Size in thousands

Sources: testyourvocab.com