Degree graduation year

• CSV field name: Degree graduation year
• API field name: graduation_year
• HESA alignment: DEGENDDT
• Description:

  The year of graduation.

• Format:

  This can be formatted as just the year, or as an ISO-8601 format date YYYY-MM-DD

• Example:

  "2012-07-31"

• Validation: Conditional - mandatory if specifying any degree