"Pew Research Center has found more than one in five nations impose an official state religion. The majority of religious-oriented countries are Muslim. Over 20 percent of the countries have a religion they tend to give more preference to. In contrast, about 53 percent of countries have no preferred or official religion." WRN
"Government restrictions on religion and social hostilities involving religion increased in 2015 for the first time in three years, according to Pew Research Center’s latest annual study on global restrictions on religion."