31.   The researchers estimate that the number may have doubled this year.

32.   Their numbers double during the holidays and triple in places with loud, repetitive Christmas music.

33.   Tuesday, which president Kim Dae Jung has declared a national holiday, the number could double again.

34.   Vaughan, who registered under the old law, said he was not surprised the number of registrations doubled.

35.   Until recently, the city of Rome spent relatively little of its own money on the homeless, whose numbers have doubled in the last two years.

36.   Within two years, the number of tourists doubled.

37.   Executive director Matt Minkovitch said that number could double or triple before and during the games.

38.   Grasso thinks he can do this in two to three years, noting the number has already doubled over the past three and a half years.

39.   Muriel Siebert and Co., another discount broker, said the number of calls doubled.

40.   She said the number could have doubled since then.