据房利美统计，4月17日当周美国30年期固定利率抵押贷款利率为6.83%，高于前一周的6.62%。

Group 1 - The core point of the article indicates that the 30-year fixed mortgage rate in the U.S. increased to 6.83% for the week ending April 17, up from 6.62% the previous week [1]