Keyword Analysis & Research: what does an open circle on a graph mean

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what does an open circle on a graph mean	0.75	1	9819	18	40
what	1.01	0.4	7242	78	4
does	1.16	0.3	1121	53	4
an	1.1	0.2	6888	15	2
open	0.72	0.1	2244	38	4
circle	1.05	0.4	7856	9	6
on	1.84	0.2	7526	81	2
a	0.54	0.2	1455	9	1
graph	1.04	0.8	3001	95	5
mean	1.47	1	1508	17	4

Keyword	CPC	PCC	Volume	Score
what does an open circle on a graph mean	0.74	0.4	3629	35