Driven by rising prices of food and manufactured goods, inflation climbed to a 13-month high of 9.78 per cent in August, this year, from 9.22 per cent in July. Overall inflation, as measured by the Wholesale Price Index, had stood at 8.87 per cent in August 2010. As per data released by the government, today, the overall inflation figure for June this year has been revised upward to 9.51 per cent, from the provisional estimate of 9.44 per cent.On an annual basis, food items became 9.62 per cent more expensive in August. Onions grew 45.29 per cent costlier, while fruit prices were up 22.82 per cent, and potatoes by 12.53 per cent. Overall, vegetable prices saw 11.8 per cent inflation during August. Inflation in overall primary articles stood at 12.58 per cent. Prices of manufactured products rose 7.79 per cent in August. This is the ninth consecutive month when inflation has stood above the 9 per cent-mark.