The inflation rate in Honolulu in the second half of 2011 rose at the fastest rate in four years, led by increases in electricity and gasoline prices, according to a report released today.

Inflation, as measured by the Consumer Price index, rose by 4 percent in the second half of 2011 compared with the second half of 2010, the Bureau of Labor Statistics reported.

Among the components in the index, the biggest increase was in household electricity costs, which rose 34.3 percent during the period. Gasoline prices rose 19 percent.

The year-over-year increase in the index was the largest since the second half of 2007 when it rose by 4.8 percent.