North Korea's economy expanded by 1 percent in 2014, the South Korean central bank said Friday, with a drought expected to hobble growth in one of the world's most isolated countries this year.

After suffering a contraction in 2010, North Korea's economy grew, albeit at relatively low levels, for four straight years. In 2013, GDP grew by 1.1 percent.

The slightly faster expansion last year was marked by growth in services and signs of rising private consumption, the Bank of Korea said in an annual report.