There were twice as many bank robberies in Houston in 2012 than there were in 2011, according to the FBI.

FBI officials said there were 160 bank robberies in 2012.

There were 78 bank robberies in Houston in 2011.

FBI officials said 2010 was a record year, when 171 bank robberies occurred.

Officials have not said if they think there was a reason for the sharp decline and then spike.