Original link:

http://www.homeoffice.gov.uk/rds/pdfs04/hors276.pdf

Report cover:

Home Office Research Study 276
Domestic violence, sexual assault
and stalking: Findings from the
[2001] British Crime Survey
Sylvia Walby and Jonathan Allen

The views expressed in this report are 
those of the authors, not necessarily
those of the Home Office (nor do they 
reflect Government policy).
Home Office Research, Development 
and Statistics Directorate
March 2004

Report page 23:

Well over a million women reported experiencing
stalking behaviour.

Report page 24:

Almost 900,000 men were affected by
stalking.

2001 Census link:

http://www.statistics.gov.uk/census2001/pop2001/united_kingdom.asp

Total stalking targets:  1,900,000

Total UK population per
2001 census:            58,789,194

Stalking target %:            3.23%

(or, over 3 people per 100 in 2001)