Average weekly hours of nonsupervisory workers in retail industries, 1972-1999 Industry 1972 1999 Building materials 38.9 35.2 General merchandise 31.7 29.6 Food stores 32.8 29.9 Automotive dealers 39.8 35.5 Apparel 31.0 26.3 Furniture 37.0 33.0 Eating and drinking 30.4 25.6 Miscellaneous retail 34.0 29.6