*With four days left for people to return their census forms, Census Bureau director Robert Groves on Monday urged those in big cities and border regions to step up the response to avoid visits by census takers next month.

So far, about 65 percent, or more than 77 million households, have completed and mailed back the 10-question forms. The Midwest leads the pack, while the southern and western U.S. and big cities such as New York, Chicago and Philadelphia are lagging.

At a news conference, Groves said most of the lagging areas are either rural or have dense populations, or have more minority and non-English speaking people. That was also the case in 2000.

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