Archive < Businesses < Sole Proprietorship Reports 1957 to 1984 Sole Proprietorship Reports Here you'll find historic reports that present sole proprietorship data from business schedules filed with individual income tax returns. The economic activities described in these reports encompass virtually the entire range of unincorporated, one-owner businesses and professional practices. 1957–1984PDF 1977PDF 1978PDF 1979–1980PDF 1981PDFNonfarm Sole Proprietorship Statistics main page Archive < Businesses < Sole Proprietorship Reports