According to an industry report released Wednesday, demand for US mortgages has dropped by nearly a third over the past year as a key interest rate spiked for the first time in more than a decade.

The Mortgage Bankers Association said in a weekly update that the number of mortgage purchase applications in the week ended September 9 was down 29% from the year before.

The total loan application volume went down. The index fell 4% from a week ago and was lower than it was a year ago.

The 30-year fixed mortgage rate reached the 6.05% mark for the first time since 2008 and doubled what it was a year ago.

"Rising mortgage rates and elevated home prices continue to have a huge impact on affordability and home buyer confidence levels, and we expect to see home prices begin to fall on a national basis in July/August."

Mortgage rates have followed the rise in Treasury yields this year, with the Federal Reserve increasing interest rates in order to lower inflation. The 10-year Treasury yield was 3.41% on Thursday, compared with 1.51% at the end of the previous year.

According to the update, higher mortgage rates have contributed to more homebuyers staying on the sidelines.

He said that government loans, which first-time buyers tend to favor, bucked the trend of declines and increased over the week.