The average rate on 30-year fixed mortgages fell to 4.76 percent this week, while the rate on the 15-year home loan slipped below 4 percent, Freddie Mac said Thursday. Here's a historical look at rates for fixed and adjustable mortgages for the last 52 weeks.

Current week's average rate(1) Previous week's average rate(2) 52-week high(3) 52-week low (4)

                  1     2    3    4

30-year fixed 4.76 4.88 5.21 4.17

15-year fixed 3.97 4.15 4.52 3.57

5-year adjustable 3.57 3.73 4.25 3.25

1-year adjustable 3.17 3.21 4.25 3.17