 As of 2011, air arrivals constitute only about 1.4% of all visitors, down from 38% in 1974 during the frontier closure.Both air and sea traffic is dominated by British visitors; over 80% of departing air passengers leave for the UK, while 93% of cruise passengers are also British.By contrast, nearly 80% of day visitors by land (and thus effectively 80% of all visitors) are Spanish nationals.