LAFAYETTE, Ind. (AP): A new study says that more than a quarter of Indiana residents regularly volunteered last year to help nonprofit groups carry out their missions.

The report by the Corporation for National and Community Service's report found that 28.2 percent of Hoosiers, or about 1.37 million people, regularly volunteered during 2013. That ranked Indiana 23rd among other states and Washington, D.C., when it comes to volunteering.

Indiana's volunteers logged 131.1 million hours last year, the equivalent of about $2.9 billion.

Nonprofits say volunteers' time is irreplaceable because it helps them carry out their missions. Habitat for Humanity of Lafayette executive director Doug Taylor says the group “couldn't have an affordable housing program without volunteers.”

He says each house takes about 2,500 volunteer hours to complete.