sydney dec 7 reuters  australias economy slowed a little in the september quarter as high prices and rising interest rates sapped consumer spending power a sign aggressive policy tightening is working to cool demand data from the australian bureau of statistics on wednesday showed real gross domestic product gdp rose 06 in the third quarter compared with 09 the previous quarter and just under forecasts of 07 annual growth still sped to a heady 59  faster than china  though largely thanks to a oneoff boom late last year as the economy reopened from pandemic lockdowns