The three Birmingham constituencies aggregated above have over 180,000 registered voters between them, though over 40% failed to use their vote in the last couple of General Elections. Had non-voters come to the polling station and all voted for "None of the above", they would have won in 2005 and 2001, and come second to Labour's "landslide" victory in 1997.
One person's vote is worth c. 1/36,000th of the active voters, and less than 1/60,000th of potential voters*.
Little wonder that modern politics is a matter of computer-assisted psephology, spin and deception.
*Nationwide, the average is 69,935 voters per constituency (2007 Boundary Commission review)