With the adjustment of the U.S. Census this week, a thousand Utahns disappeared from the Beehive State's official population figure.

The U.S. Census Bureau on Wednesday issued new state population estimates after adjusting the figures based on more detailed information.Under the law, the bureau must issue population estimates by the end of each year for use in government planning and programs. It did not have all the information available at the end of 1988, so it released interim estimates based on a simplified calculation.

The adjustment dropped Utah's estimated population from 1,691,000 to 1,690,000.

The change also creates more of a gap with the state's own estimate of 1,695,000, said Jim Robson, a research analyst with the Demographic and Economic Analysis Division of the Utah Office of Planning and Budget.

He said the state uses a different methodology and more current numbers to determine its figures.

"We would probably contend the state-produced estimate is more accurate . . . but all estimates are subject to error," Robson said.

"The state's estimate usually is within 1,000 or 2,000 of the Census Bureau's figure, so it's a little bit of a concern to us," said Brad Barber, director of the division.

Most of Utah's neighbors gained residents with the new figures. Idaho is 4,000 residents stronger, from 999,000 to 1,003,000; Arizona greeted 23,000 residents, from 3,466,000 to 3,498,000; Colorado increased from 3,290,000 to 3,301,000; and Wyoming moved from 471,000 to 479,000.

Nevada's estimated population decreased, from 1,060,000 to 1,054,000.