ISLAMABAD - The weekly inflation surged by 10.92 per cent during the week ended on Friday over the corresponding week of the last year. This increase in inflation, measured through the Sensitive Price Index (SPI), occurred due to rising prices of 18 food items in the week, said the data issued by Federal Bureau of Statistics on Saturday. The inflation, however, recorded a marginal increase of 0.46 per cent during the week under review over the previous week. The SPI witnessed an increase of 10.84 per cent and 11.27 per cent for households having income range between Rs 3,000 and Rs, 5000 respectively. For households in the income brackets of Rs 5001 to 12,000, the increase in the SPI was 12.87 per cent and for households in the income basket of over Rs 12000, the inflation registered a growth of 11.53 per cent over the week of the last year. The weekly SPI covered 17 urban cities and 53 essential items for all income groups. In the week ended on Friday, the prices of 18 items went up whereas of 9 items declined and of 26 remained same. The prices of the following goods increased on weekly basis; vegetable ghee (tin) 6.82 per cent, potatoes 6.41 per cent, bananas 2.54 per cent, cooking oil 1.91 per cent, milk 1.88 per cent, gur 1.84 per cent, curd 1.18 per cent, moong pulse washed 0.87 per cent, tea (prepared) 0.68 per cent, sugar 0.67 per cent, mash pulse washed 0.55 per cent, vegetable ghee loose 0.37 per cent, gram pulse washed 0.31 per cent, beef 0.29 per cent, mutton 0.25 per cent, rice Irri-6 0.17 per cent, tomatoes 0.12 per cent and red chillies 0.09 per cent. However, the prices of the following commodities declined on weekly basis; onions 10.58 per cent, wheat average quality 1.11 per cent, LPG (11kg cylinder) 0.93 per cent, egg 0.85 per cent, garlic 0.78 per cent, wheat flour average quality 0.48 per cent, chicken 0.37 per cent, firewood 0.11 per cent and masoor pulse washed 0.03pc.