Matador Computer Services assembles customized personal computers from generic parts. The company has had steady growth since it started. Because it's run by Texas Tech University students, it assembles computers mostly at night, using part$-$time student employees. The company has accumulated data shown in the accompanying table for its computers during the last $12$ years.

Using the nailve approach to forecasting, what is the expected demand for the following year which is the $13$ th year.