The most significant price rises in the quarter were for petrol (up 5.7 per cent) and electricity (up 2.5 per cent) but this was partly offset by a 6.7 per cent drop in fruit prices. It lifted the annual CPI rate to 2.1 per cent, and just inside the Reserve Bank's two to three per cent target band. Underlying measures of inflation, which smooth out volatile price swings and are key to interest rate decisions, averaged just over 0.4 per cent growth in the quarter for an annual rate of 1.8 per cent.