Book excerpt: This statistical & research supp. to the 2000-01 Occupational Outlook Handbook presents detailed, comprehensive stat. used in preparing the Handbook. Discusses recent research results & other topics -- info. that is valuable to training officials, educ. planners, vocational & employ. counselors, jobseekers, & others interested in occupational info. Presents detailed info. about all occupations in the nat. industry-occupation matrix, & the factors affecting each of these categories. Defines what the data on replacement needs represent, & describes how they were prepared. Provides data on completions of institutional educ. & training programs by field.