The sea's surface area shrank by approximately 60%, and its volume by 80%. In 1960, the Aral Sea was the world's fourth-largest lake, with an area of approximately 68,000 km² and a volume of 1100 km³; by 1998, it had dropped to 28,687 km², and eighth-largest. The amount of water it has lost is the equivalent of completely draining Lakes Erie and Ontario. Over the same time period its salinity has increased from about 10 g/L to about 45 g/L. As of 2004, the Aral Sea's surface area was only 17,160 km², 25% of its original size, and still contracting.[citation needed] By 2007 the sea's area shrunk to 10% of its original size, and the salinity of the remains of the southern part of the sea (the Large Aral) increased to to levels in excess of 100 g/L.[1] By comparison, the salinity of ordinary seawater is typically around 35 g/L; the Dead Sea's salinity varies between 300 and 350 g/L.