51.   It is contained in about one-third of the gasoline sold in America, according to official estimates.

52.   It marked the first official estimate of the strength of the triad gang.

53.   It said he was referring to official estimates of voter preferences.

54.   It was the first official estimate for losses caused by problems at the airport.

55.   No official estimates of the flood damage have been provided so far.

56.   No official estimates of the losses incurred by the floods have been provided so far.

57.   No new official estimates were given Tuesday.

58.   Official estimates were not available early Monday.

59.   Officials from the Netherlands Antilles and French governments have yet to gather official estimates of property damage.

60.   No official estimates are available on how big the problem is, but it threatens to put many local fledgling industries out of business.