Keyword Analysis & Research: what does the number 16 mean

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what does the number 16 mean	0.85	0.5	4951	72	28
what	0.84	0.4	4734	49	4
does	0.12	0.8	4454	22	4
the	0.17	0.8	7383	75	3
number	1.8	0.7	275	81	6
16	1.08	1	7466	57	2
mean	0.78	0.1	1039	13	4

Keyword	CPC	PCC	Volume	Score
what does the number 16 mean	1.97	0.4	9183	61