Lufkin — In what could be a sign of an improving economy, Lufkin extended its string of monthly increases in year-to-year sales tax revenue in January, according to a state comptroller report released Wednesday.

Lufkin showed an increase of about 4.6 percent, collecting $1,496,782 compared to $1,431,621 collected in January 2011.

Lufkin has collected $2,499,628 in the first two months of the year, up about 3.7 percent from the $2,410,219 collected in the first two months of 2011.

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