crackdowns on opposition political parties and protests, persecution of non-governmental organisations and enforced suppression and killings of independent journalists, and censorship of mass media and internet. Russia's autocratic political system has been variously described as a kleptocracy, an oligarchy, and a plutocracy. It was the lowest rated European country in Transparency International's Corruption Perceptions Index for 2021, ranking 136th out of 180 countries. Russia has a long history of corruption, which is seen as a significant problem. It impacts various sectors, including the economy, business, public administration, law enforcement, healthcare, education, and the military. Muslims, especially Salafis, have faced persecution in Russia. To quash the insurgency in the North Caucasus, Russian authorities have been accused of indiscriminate killings, arrests, forced disappearances, and torture of civilians. In Dagestan, some Salafis along with facing government harassment based on their appearance, have had their homes blown up in counterinsurgency operations. Chechens and Ingush in Russian prisons reportedly take more abuse than other ethnic groups. During the 2022 invasion of Ukraine, Russia has set up filtration camps where many Ukrainians are subjected to abuses and forcibly sent to Russia; the camps have been compared to those used in the Chechen Wars. Economy Russia has a mixed economy, with enormous natural resources, particularly oil and natural gas. It has the world's ninth-largest economy by nominal GDP and the sixth-largest by PPP. The large service sector accounts for 62% of total GDP, followed by the industrial sector (32%), while the agricultural sector is the smallest, making up only 5% of total GDP. Russia has a low official unemployment rate of 4.1%. Its foreign exchange reserves are the world's fifth-largest, worth $540 billion. It has a labour force of roughly 70 million, which is the world's sixth-largest. Russia is the world's thirteenth-largest exporter and the 21st-largest importer. It relies heavily on revenues from oil and gas-related taxes and export tariffs, which accounted for 45% of Russia's federal budget revenues in January 2022, and up to 60% of its exports in 2019. In 2019, the Natural Resources and Environment Ministry estimated the value of natural resources to be 60% of the country's GDP. Russia has one of the lowest levels of external debt among major economies, although its inequality of household income and wealth is one of the highest among developed countries. High regional disparity is also an issue. After over a decade of post-Soviet rapid economic growth,