research 17.7 registered voters showed Public Policy Institute of California numbers 62 percent of likely voters survey Public Policy Institute of California 73% bothered to register to vote almost 45 percent of the voters are Democrats 73% bothered to register to vote almost 45 percent of the voters are Democrats 6.5 eligible but unregistered voters constitute 47% of likely voters only 17 percent showed report showed 73% bothered to register to vote constitute 47% of likely voters almost 45 percent of the voters are Democrats PPIC almost 45 percent of the voters are Democrats constitute 47% of likely voters