A report on Hollywood films released Monday found only eight major studio films last year included LGBT characters essential to the film's plot.

GLAAD's Studio Responsibility Index (SRI) “maps the quantity, quality and diversity of images of LGBT people in films released by the seven largest motion picture studios during the 2015 calendar year.”

Fourteen of Hollywood's 126 releases included minor characters identified as lesbian, gay, bisexual and/or transgender, the group found in its fourth annual survey.

“Hollywood's films lag far behind any other form of media when it comes to portrayals of LGBT characters,” said GLAAD President & CEO Sarah Kate Ellis. “Too often, the few LGBT characters that make it to the big screen are the target of a punchline or token characters. The film industry must embrace new and inclusive stories if it wants to remain competitive and relevant.”

Four studios, 20th Century Fox, Lionsgate Entertainment, Sony Columbia Pictures, and Universal Pictures, received “adequate” grades, while Paramount Pictures, Walt Disney Studios and Warner Brothers received “failing” grades.

The report found only 8 films pass the group's “Vito Russo Test” named after one of its co-founders.

To pass the test, characters cannot be solely or predominantly defined by their sexual orientation or gender identity and must be “tied into the plot in such a way that their removal would have a significant effect.”

Smaller affiliated studios fared better overall, with 22 percent of films from studios such as Focus Features and Fox Searchlight deemed LGBT inclusive.