Mortgage rates fell again this week but remain uncomfortably high for many would-be buyers.

Freddie Mac's latest Primary Mortgage Market Survey, released Thursday, showed that the average rate on the benchmark 30-year fixed mortgage declined to 6.77% this week from 6.89% last week. The average rate on a 30-year loan was 6.78% a year ago.

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The average rate on the 15-year fixed mortgage also dropped to 6.05% from 6.17% last week. One year ago, the rate on the 15-year fixed note averaged 6.06%.