RIS Data - SAS Format
- 1984 - 1989 RIS Data - SAS Format
- 1990 - 1997 RIS Data - SAS Format
- 1998 - 2005 RIS Data - SAS Format
- 2006 - 2015 RIS Data - SAS Format
- 2016 - 2023 RIS Data - SAS Format
RIS Data - CSV Format
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