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

The average rate on the 30-year fixed mortgage fell this week to 4.15 percent, its lowest level on records dating back to 1971, Freddie Mac said Thursday. The average rate on the 15-year fixed mortgage <a href="http://www.jordanairsneakers.com/air-jordan-22-c-27.html"><strong>Air Jordan 22</strong></a> dropped to 3.36 percent, hitting a record low for the third straight week.Here's a look at <a href="http://www.nikesoccer-shoes.com/nike-mercurial-vapor-sl-fg-grey-pink-appear-p-153.html"><strong>Nike Mercurial Vapor SL FG Grey Pink appear</strong></a> 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 4.15 4.32 5.05 4.1515-year fixed 3.36 3.50 4.29 3.365-year adjustable 3.08 3.13 3.92 3.081-year adjustable 2.86 2.89 3.53 <a href="http://www.nikeair-max.com/griffey-air-max-c-29.html"><strong>Griffey air max</strong></a> 2.86