The gap may actually grow in the coming years due to the increased order book of container ships in 2013. A wave of new orders of large vessels by most main carriers was noted in 2013 in a race to improve efficiency and reduce operational cost per TEU. The container-ship order book, which grew from 41 million dwt at the beginning of 2013 to 43 million at the beginning of 2014, represents about 20 per cent of the fleet in service (see chapter 2, figure. 2.8). The resulting overflow of orders may once again contribute to destabilizing freight rate recovery in general. Freight rates on individual routes will therefore continue to be determined by the way supply capacity management will be handled.