The Donald must be so proud.

Donald Trump's (search) third season of "The Apprentice" (search) is the most watched TV show among his peers — the rich, according to a new study that analyzed wealthy people's viewing habits.

"The show takes place in the business world and you have a very well-known CEO firing people," says the study's chief author, Magna Global USA (search) executive vice president Steve Sternberg.

"You would think that a fairly upscale audience would want to see that," he said. "Although it's hard to pinpoint exactly why an upscale audience watches a given show, we just know that they do."

Other top-ranked TV shows with the rich are "Will & Grace" (No. 2); "The Apprentice," season 2 (No. 3); "Desperate Housewives" (No. 4) and "The West Wing" (No. 5).

ABC's newcomer "Grey's Anatomy" ranks 8th after just about a month, but the two biggest shows on TV — "American Idol" and "CSI" — don't even break the study's top 20.

Sternberg said that is because the audiences for both shows are so big and made up of so many different groups of viewers.

"Anytime you have a show with ratings that high across the board, it's not going to be as upscale," said Sternberg. "It dilutes the percentage of audience that is upscale."

The study, Magna Global USA's Primetime Upscale Update (search), used ratings from Nielsen Media Research (search), which offers daily updates on the viewing habits of people living in households with an income over $125,000.

In the TV industry, networks and advertisers are most interested with specifically attracting young, wealthy viewers to watch the commercials and less concerned with mass number of viewers.

According to the study, despite a rocky season, NBC is the most attractive network for advertisers and low-rated shows like Fox's "Arrested Development" (No. 17 on the rich list) stand a chance of getting renewed.