Revenue from Egypt's Suez Canal rose 15.9 per cent year-on-year to US$434.6 million in April, and rose 5.1 per cent from a month earlier, a state website showed on Tuesday. Revenue in April 2010 was $374.9 million. Revenue in March 2011 was $413.5 million. The waterway is a vital source of foreign currency in Egypt, along with tourism, oil and gas exports and remittances from Egyptians living abroad.