According to the 'Profile of Wyoming's Voters Voter Registration and Voter Turnout' on the Wyoming Secretary of State's website, Wyoming had a turnout of 106% registered voters on November 2, 2004.

Wyoming had 232,396 registered voters - 62% of eligible voters for the 2004 General Elections; turnout of registered voters was 245,789, or 106% of registered voters.

Take a look at the official figures...

http://soswy.state.wy.us/election/profile.htm