<p style="text-align:start;" size="0" _root="undefined" __ownerid="undefined" __hash="undefined" __altered="false">It was a bumpy year for mining fortunes that have long dominated the top ranks of Australia’s richest, as weakening demand in China hammered iron ore prices. Tech-related business more than made up for that reduced momentum, contributing to a double-digit jump in collective wealth to $243 billion, up nearly 10% from a year ago.</p><p style="text-align:start;" size="0" _root="undefined" __ownerid="undefined" __hash="undefined" __altered="false"></p>
