With just one week before the election, the fight over an amendment to ban same-sex marriage continues its breakaway fundraising pace.

Minnesotans United for All Families, the group trying to defeat the measure, has raised more than $11.2 million in cash and in-kind giving this year, according to campaign finance filings released Tuesday.

Minnesota for Marriage, the group trying to pass the measure, raised $3.6 million in the same time.

"We are delighted that our 2012 donor contributions more than doubled since our last report," said John Helmberger, chairman of Minnesota for Marriage. "The surge in the number of contributors and contributions has allowed us to step up our TV, billboard, and radio ads that focus on what happens to individuals, small businesses, churches - and especially children - when same-sex marriage has been imposed elsewhere."

The group raised an additional $660,000 since the Oct. 22 cutoff date for the report, Helmberger said.

Minnesotans United has dominated the fundraising since January, as supporters flood the campaign with donations large and small. The group has raised more than $2.75 million since September, along with another $279,265 in in-kind contributions.

"We continue to see that Minnesotans are personally investing in this campaign because they know that this amendment limits a basic freedom for some Minnesotans just because of who they are," campaign manager Richard Carlbom said.

Amendment opponents have spent about $10.9 million, leaving close to $309,000 cash on hand.

Minnesotans United has raised the money from 62,000 individual donors. Since September, 25,000 individuals have contributed, and 95 percent of them are from Minnesota.

The amendment would add language to the state Constitution defining marriage solely as a union between a man and a woman.