Gold sales from Australia’s Perth Mint, which refines all the bullion output in the world’s second-biggest producer, climbed 89 percent in September to the highest level in almost a year as prices declined.

Sales of gold coins and minted bars rose to 68,781 ounces from 36,369 ounces in August and the most since October 2013, according to data from the mint compiled by Bloomberg News. Sales were about 68,487 ounces in September 2013, data show.