GOTO Tools internet options, cookie section, settings, view cookies folder.... two windows open click and delete.. try and get to the next percent.. I got to 6% wahey! Very satisfying... Will delete these instrctions in a few days.
BTW I notice that one vote sometimes 1 vote equals 2 points....are they cheating? unless someone else was voting at the same time as me.. Also the question of the survey is preselective so their figures count for nothing statistically. A survey would have to be conducted for real away from said website (random population) and a suitable question would be: "Were you irritated by any noise pollution today?" If answer "Yes".. then "What type of noise?" Car/Motorbike/ Aeroplane/Helicopter/Roadworks/Mower... or no leading options at all, etc etc. I don't think helos will feature. Cars, motorbikes, mowers maybe.
It's dangerous/misleading what they are doing.... click away with no guilt!!!