Summary Box: 3-D lifts world box office to $30 bln

3-D BOOM: 3-D movies helped boost movie ticket sales by nearly 8 percent to a record $29.9 billion worldwide in 2009.

— 3-D BOOM: 3-D movies helped boost movie ticket sales by nearly 8 percent to a record $29.9 billion worldwide in 2009.

SCREEN COUNT GROWING: The number of screens able to show 3-D movies in the U.S. and Canada more than doubled to 3,548. Internationally, the count grew fivefold to 5,441.

PRICES STILL CLIMBING: Partly because of higher 3-D ticket prices, the average ticket price in the U.S. and Canada rose 4 percent to $7.50, even though average consumer prices fell.

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