Puzzle for December 12, 2008

This weekend we'll get a tree for our house. Between 34 and 36 million Christmas trees are produced each year.

The tallest living Christmas tree is believed to be the 122-foot, 91-year-old Douglas fir in the town of Woodinville, Washington. If Christmas trees generally take 6-8 years to mature, what year did the tree become a "Christmas Tree"?