(The Raw Steel production tonnage provided in this report is estimated. The figures are compiled from weekly production tonnage provided from 50% of the domestic producers combined with monthly production data for the remainder. Therefore, this report should be used primarily to assess production trends. The AISI production report “AIS 7,” published monthly and available by subscription, provides a more detailed summary of steel production based on data supplied by companies representing over three quarters of U.S. production capacity.)