The Sardinian economy is, however, constrained due to the high costs of the transportation of goods and electricity, which is twice that of the continental Italian regions, and triple that of the EU average. Sardinia is the only Italian region that produces a surplus of electricity, and exports electricity to Corsica and the Italian mainland: in 2009, the new submarine power cable Sapei entered into operation. It links the Fiume Santo Power Station, in Sardinia, to the converter stations in Latina, in the Italian peninsula. The SACOI is another submarine power cable that links Sardinia to Italy, crossing Corsica, from 1965.