On an output per worker basis, UK productivity was 19% below the average for the rest for the G7 in 2013, the ONS said.
It added: "Across the G7 as a whole, productivity as measured by output per hour and output per worker grew by around 1% in 2013 as the global economic recovery gathered momentum. In the UK, output per worker also grew in 2013, but output per hour fell."
