How deep is every tube station on the Underground?

[yummy125]

This is a good spreadsheet to show how deep the stations are:

http://www.ianvisits.co.uk/blog/2011/07/01/how-deep-is-every-tube-station-on-the-underground/

 

[SS4]

That's quite interesting, especially Harrow and Wealdstone on the Picc

edit: As I understand it the depth is X-100m below sea level where X is the figure in the daat?