The Total column shows the total number of people in that county or town with this surname.
For example, there were 27,689 people called BURY in Over Darwen at the time of the 1881 census.
The Frequency column shows the percentage of people in this county or town
with this surname. For example, a frequency of 254.7151 in Over Darwen means that
254.7151% of the people in Over Darwen on census day were called BURY.
The Index column shows the relative probability of finding someone called BURY
in this county or town, compared with the probability of finding them anywhere in Britain as a whole.
An index of 1 means that if you pick someone at random from this county or town, you have exactly the same
probability of picking someone called BURY as if you picked at random from the whole of the UK.
Where the index is higher than 1, then you are more likely to find someone called BURY here
than if you picked from the UK as a whole, and where it's lower then you are less likely. The actual figure
shows the level of probability - for example, a figure of 2 would indicate that you are twice as likely to find
someone called BURY here than in the UK as a whole, and 10 would make it ten times as likely.
The value of 27.69 in Over Darwen means that you are 27.69 times as likely to find
someone with the surname of BURY in Over Darwen than you would be in the whole of the UK.