Each year the U.S. Department of Education calculates a cohort default rate on Federal Direct Loans by institution. A cohort default rate by definition is the percentage of a school's borrowers who enter repayment on certain Direct Loans during that fiscal year and default within the cohort default period (the end of the following fiscal year for a three-year rate).
Luther College's 2019 Fiscal Year Direct Loan Default Rate is 0.5 percent.
By comparison, here are some additional cohort default rates for the same period of time: