LONDON, Jul. 21 -- The world tin market was in surplus by 1,100 metric tons in January to May, the World Bureau of Metal Statistics said Wednesday.

Global refined tin production, excluding reprocessed LME metal, rose by 9,300 tons compared with the same period in 2009, it said. The WBMS didn't provide a total output figure.

Meanwhile, global tin demand rose 3.1% on the year to 151,700 tons, it said.

The WBMS said U.S. apparent consumption in the first five months of the year was estimated at 11% below the year-earlier period "due to exceptionally low imports of metal in April 2011."