Self-service grocers 1950sBy 1957, there were  1700 self-service grocers in Australia.  Although only about 7% of them could be termed supermarkets, these accounted for 20% of sales. The image, from the State Library of New South Wales, shows the interior of the Broadhead & Barcham self-service grocers, Balmain , in 1957. See also Timeline of Retail Grocery Trends.