Singapore's retail sales grew for the sixth straight month in July, rising 1.1 per cent on year and picking up slightly from the revised 1 per cent growth recorded in June, Department of Statistics (Singstat) data showed on Tuesday (Sep 5). The month's growth was supported by tourist arrivals, economists said. Though lower than the median 2.1 per cent rise expected by private-sector economists polled by Bloomberg, economists still expect tourism improvements to support retail sales in the coming months. On a month-on-month seasonally adjusted basis, retail sales rose 0.6 per cent, reversing from the 0.8 per cent contraction charted in June.