A new terrorism database analysis shows almost two-thirds of the terror attacks in the United States last year were carried out by right-wing extremists.

Researchers and journalists for the news site Quartz said they used data compiled by the Global Terrorism Database that has tabulated terrorist events around the world since 1970. The database is supported by the National Consortium for the Study of Terrorism and Responses to Terrorism (START), affiliated with the University of Maryland.

“A Quartz analysis of the database shows that almost two-thirds of terror attacks in the (United States) last year were tied to racist, anti-Muslim, homophobic, anti-Semitic, fascist, anti-government, or xenophobic motivations,” its posting says.

The remaining attacks, the web site said, “were driven by left-wing ideologies … and Islamic extremism.”