That was up 41 percent from Phil Mickelson's thrilling victory last year (7.3 with an 18) and the highest since Woods' last victory at Augusta in 2001 (12.9 with a 27 share), when he became the first golfer to hold all four major titles at the same time.
This year was the first time in three years that commercials were shown during the Masters.
The rating is the percentage of all homes with TVs, whether or not they are in use. The share is the percentage of homes with sets in use.
Overnight ratings measure the 55 largest TV markets in the United States, covering nearly 70 percent of the country.
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