Keyword Analysis & Research: when did they start zip codes

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when did they start zip codes	1.29	0.6	7712	49	29
when	0.91	0.4	4555	77	4
did	0.63	0.1	2732	38	3
they	1.4	0.7	1018	74	4
start	0.71	0.1	5848	100	5
zip	1.48	0.2	7884	31	3
codes	1.68	0.8	6007	49	5

Keyword	CPC	PCC	Volume	Score
when did they start zip codes	1.61	0.4	1273	65