In the first eight years of the Export Cargo Report, the stress crack index was reported in DSC is the percentage of kernels with exactly two cracks; and MSC is the percentage of kernels with more than two cracks. The U.S. Aggregate percent stress cracks and stress crack index from the first eight Export Cargo Reports is displayed in the scatter chart below. Given its strong correlation (r = 0.97) to percent stress cracks, it was determined that the stress crack index provided limited