According to the Secretary of State of California, as of October 22, 2012, Solano County has 209,484 registered voters, out of 274,284 eligible (76.4%). Of those, 101,815 (48.6%) are registered Democrats, 52,777 (25.2%) are registered California Republican Party, and 45,581 (21.8%) have Decline to State a political party. Democrats hold voter-registration advantages in all incorporated cities and towns in Solano County. However, Republicans lead in registration in the unincorporated communities of the county (40%-35%), making Solano the only county in the Bay Area where Republicans out-number Democrats in unincorporated communities. The Democrats largest registration advantage in Solano is in the city of Vallejo, California, wherein there are only 8,242 Republicans (14.6%) out of 56,313 total voters compared to 33,753 Democrats (59.9%) and 12,157 voters who have declined to state a political party (21.6%).
Question: How many more voters in Vallejo decline to state a political party than identify as Republican?
Answer: 3915