The inflation in Istanbul increased by 3.9 percent in September, bringing the annual inflation rate down to 59.18 percent. The inflation rate for the month of September in Istanbul has been disclosed. According to the Istanbul Chamber of Commerce (ITO) data, retail prices in Istanbul rose by 3.9 percent in September. Wholesale prices showed a monthly increase of 4.67 percent. Retail prices were recorded at 59.18 percent annually, while wholesale prices were at 47.89 percent.