Annuals and Proxies Form 10-Ks Filing date View Dec 13, 2021 View HTML 0000807863-21-000098.pdf 0000807863-21-000098.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA Dec 11, 2020 View HTML 0000807863-20-000140.pdf 0000807863-20-000140.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA Dec 7, 2020 View HTML 0000807863-20-000136.pdf 0000807863-20-000136.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA Dec 6, 2019 View HTML 0000807863-19-000080.pdf 0000807863-19-000080.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT Dec 14, 2018 View HTML 0000807863-18-000115.pdf 0000807863-18-000115.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT Proxy Statements Filing date View Jan 26, 2022 View HTML 0000807863-22-000012.pdf 0000807863-22-000012.xls Jan 22, 2021 View HTML 0000807863-21-000008.pdf 0000807863-21-000008.xls Jan 27, 2020 View HTML 0000807863-20-000012.pdf 0000807863-20-000012.xls Jan 28, 2019 View HTML 0000807863-19-000005.pdf 0000807863-19-000005.xls Jan 29, 2018 View HTML 0000807863-18-000006.pdf 0000807863-18-000006.xls