We know what you did last summer — you watched more TV.

Americans watched more TV last season than any other year since Nielsen Media Research (search) started tracking it in the 1950s.

The average American household watched eight hours, 11 minutes of TV per day, up a few minutes from last year — and nearly 45 minutes more than we were watching 10 years ago, according to data released by Nielsen Media Research.

Individual viewing habits — about four and a half hours daily — was the highest in 15 years.

There were also slightly higher viewing levels this summer compared to summer 2004 (94.7 million people compared to 93.7 million the summer before) and for the first week of the new TV season.

The number of people watching television (109 million) during primetime increased slightly in the premiere week compared to the first week of the 2004-05 season.