By Jose Serrano (staff@latinospost.com) | First Posted: Jul 21, 2015 02:50 PM EDT

If a Latino contributes to a Sunday news show, chances are either Fox host Juan Williams or CNN's Ann Navarro received the call.

Left-leaning Media Matters for America reported a 42 percent drop in Hispanic guest appearances across seven different shows this year when compared to the tail end of 2014. Only 46 of 1,172 guests - or 4 percent - were Latino, according to the group's study, which took data from English-language Sunday news programs between Jan. 4 and May 3.

The majority of appearances were between Navarro - who accounted for four of six Latino appearances on ABC's This Week- and Williams, the Panama-born contributor who routinely sits in on Fox News Sunday round-table discussions. Williams covers 90 percent of guests, up from 60 percent last year.

Diversity among Sunday shows is near-exclusive to cable networks, the report states.

"The case for inclusion (of Latinos) has never been more clear with Latinos fueling a national controversy about Donald Trump's bigotry and influencing the business community's decision to dump Trump," said Angelo Carusone, Media Matters for America vice president, in speaking with NBC News.

At a time when racism and immigration reform are among potential voters' top concerns, Media Matters found only Spanish-language networks are emphasizing them over other issues. Al Punto and Enfoque hosted a combined 61 guests who spoke on immigration, while 13 others talked about jobs, the economy, health care, or education.

Conversely, no English-language shows featured Latinos speaking about anything other than immigration. Nine percent talked about the economy and four percent talked about health care, despite the high level of uninsured Hispanics in the country.

"Sunday shows sharply reducing their inclusion of Hispanic voices not only does a disservice to the audience but is disconnected from the significant role this community plays in our society," Carusone said.

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