U.S. crude prices continued a relentless dive early on Tuesday approaching a 20 percent drop since the beginning of the year as analysts scrambled to cut their 2016 oil price forecasts and traders bet on further price falls. U.S. crude West Texas Intermediate (WTI) (CLc1) were trading at $31.34 per barrel at 0805 GMT (0300 EDT) on Tuesday, down 7 cents from their last settlement and almost 19 percent lower than at the beginning of the year.