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. 1957–1984 PDF 1977 PDF 1978 PDF 1979–1980 PDF 1981 PDF Nonfarm Sole Proprietorship Statistics main page Archive < Businesses < Sole Proprietorship Reports