The United States submits an annual report on religious freedom and persecution to the Congress containing data it has collected from U.S. embassies around the world in collaboration with the Office of International Religious Freedom and other relevant U.S. government and non-governmental institutions. The data is available to the public. The 2018 study details, country by country, the violations of religious freedom taking place in approximately 75% of the 195 countries in the world. Between 2007 and 2017, the PEW organization found that "Christians experienced harassment by governments or social groups in the largest number of countries"—144 countries—but that it is almost equal to the number of countries (142) in which Muslims experience harassment. PEW has published a caution concerning the interpretation of these numbers: ""The Center's recent report ... does not attempt to estimate the number of victims in each country... it does not speak to the intensity of harassment...""