Oil prices rose on Tuesday, lifted by healthy economic growth as well as the ongoing supply curtailments by a group of exporters including OPEC and Russia. Brent crude futures LCOc1 were at $69.38 a barrel at 0756 GMT, up 35 cents, or 0.5 percent, from their last close, not far off the three-year high of $70.37 reached on Jan. 15. U.S. West Texas Intermediate (WTI) crude futures CLc1 were at $63.93 a barrel, up 36 cents, or 0.6 percent, from their last settlement. WTI rose to its highest since December 2014 on Jan. 16 at $64.89. Traders said oil markets were generally well supported by healthy economic growth. The International Monetary Fund (IMF) on Monday revised upward its forecast for world economic growth in 2018 and 2019, to 3.9 percent for both 2018 and 2019, a 0.2 percentage point increase from its last update in October. […]