Commodities84% of survey respondents see such holdings increasing in next five yearsA World Gold Council survey shows that central banks are increasingly taking a shine to the precious metal. (Photo by Miki Kamiyama)TOKYO -- Central banks expect gold's share of the total reserves held by such institutions around the world to increase over the next five years while dollar-holdings decline, a World Gold Council survey showed on Tuesday, indicating a gradual shift away from the greenback.