Mortgage rates for the past 52 weeks, at a glance (AP)

Fixed mortgage rates fell this week to the lowest levels in six decades, Freddie Mac said Thursday. Here's a look at rates for fixed and adjustable mortgages over the past 52 weeks.Current week's average Last week's average 52-week high 52-week low30-year fixed 4.12 4.22 5.05 4.1215-year fixed 3.33 3.39 4.29 3.335-year adjustable 2.96 2.96 3.92 2.961-year adjustable 2.84 2.89 3.48 2.84All values are in percentage points.Source: Freddie Mac Primary Mortgage Market Survey.

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