A central bank operates under an inflation-targeting framework, aiming for a stable annual inflation rate of 2.5%. The bank's research department estimates that long-run real output growth is constant at 3.0% per annum, while the velocity of circulation of money is decreasing by 1.5% per annum.

Using the percentage change approximation of the Fisher equation of exchange ($MV=PQ$), which growth rate of the money supply must the central bank target to achieve its inflation objective?