A stock was trading at $122.35 at the end of year 1. It was trading at the end of year 2 at $115.65 immediately after giving a dividend of $4.50. At the end of year 3. it was trading at $125.85 immediately after giving a dividend of $4.70. Finally, it was trading at $135.95 at the end of year 4 without giving out any dividend. What was the arithmetic average annual return of this stock for the three years between years 1 and 4?