Keyword Analysis & Research: why has my pound sign changed to a hash

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why has my pound sign changed to a hash	1.19	0.1	5225	90	39
why	0.27	0.9	7186	93	3
has	0.8	0.1	6036	87	3
my	1.23	0.6	269	9	2
pound	0.52	1	5254	32	5
sign	1.6	0.1	1136	5	4
changed	1.91	0.2	9372	14	7
to	1.34	1	1571	70	2
a	0.67	0.2	2834	22	1
hash	0.03	0.4	5152	27	4

Keyword	CPC	PCC	Volume	Score
why has my pound sign changed to a hash	1.7	0.2	9585	65