From True News from ChangeNYC.Org:
The City's election results from a half-century ago look like misprints. 3.46 million out of the City's 3.53 million registered voters, a staggering 98%, cast ballots in the 1952 Presidential election. One year later, 93% of registered New Yorkers voted in the Mayoral election. Today, the bottom has fallen out for the City's electorate. Only 27% of the City's registered voters cast their ballots in the last mayoral election in 2005. 39% of registered voters took part in the Mayoral election of 1997. Voter turnout was less than 20% for City Council elections in 1999.