Sort array

How can I sort the following array so that it is sorted by the first of the two values, in descending order? (i.e. 16, 10, 1)

Array
(
    [0] => stdClass Object
        (
            [name] => undefined
            [values] => Array
                (
                    [0] => 16
                    [1] => 0
                )

        )

    [1] => stdClass Object
        (
            [name] => GBP
            [values] => Array
                (
                    [0] => 1
                    [1] => 0.01
                )

        )

    [2] => stdClass Object
        (
            [name] => EUR
            [values] => Array
                (
                    [0] => 10
                    [1] => 2.37
                )

        )

)

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