By the numbers

2008 voter registration

185 million: Approximate number of registered voters as of Nov. 3

136.6 million: Early projection of number of ballots cast in 2008

142 million: Estimated number of registered voters in 2004

122.3 million: Number of ballots cast in 2004

129.5 million: Estimated number of registered voters in 2000

111 million: Number of ballots cast in 2000

Sources: “Wired” magazine, U.S Census Bureau, National Association of Secretaries of State