Credit scores improved in September for many consumers, according to a report released last week by Credit Karma Inc., a San Francisco-based company whose Web site tracks credit scores. Nationally, 39% of consumer credit scores increased compared with 37% that did in August, according to data from approximately 72,000 Credit Karma user scores. Some 32% of consumers' credit scores remained the same in September compared with 34% that did in August. Also, 29% of consumers' credit scores decreased in September, the same percentage as in August. The average consumer had $6,641 in credit card debt last month, down 2% from $6,775 in August. The average consumer credit score decreased one point from the previous month to 672. The Denver metropolitan area, which had the highest percentage of decreasing credit scores in August, had the highest percentage of increasing scores in September at 42%. Louisiana had the highest increase in credit card debt from June to September among all states, according to the report.