Average consumer debt decreased slightly in September, while credit scores improved for many, according to data released last week by Credit Karma Inc.

Nationally, credit scores increased for 39% of consumers last month, compared with 37% in August, according to data from 72,000 Credit Karma users.

The San Francisco company operates a Web site tracks users' credit scores.

Credit scores were unchanged for 32% of consumers, and decreased for 29%, the same rate as in August.

The average consumer credit score decreased one point from August to 672, and the average consumer had $6,641 in credit card debt last month, down 2%, from $6,775 in August.

The Denver metropolitan area, which had the highest percentage of decreasing credit scores in August, had the largest percentage of increasing scores in September at 42%. Louisiana had the biggest increase in credit card debt from June to September, according to the report.

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