the Estonian language, Constitution and a pledge of loyalty to Estonia. The government offers free preparation courses for the examination on the Constitution and the Citizenship Act, and reimburses up to 380 euros for language studies. Under the law, residents without citizenship may not elect the Riigikogu (the national parliament) nor the European Parliament, but are eligible to vote in the municipal elections. As of 2 July 2010, 84.1% of Estonian residents are Estonian citizens, 8.6% are citizens of other countries (mainly Russia) and 7.3% are "persons with undetermined citizenship". Between 1992 and 2007 about 147,000 people acquired Estonian or Russian citizenship, or left the country, bringing the proportion of stateless residents from 32% down to about 8 percent. According to Amnesty International's 2015 report, approximately 6.8% of Estonia's population are not citizens of the country. In late 2014 an amendment to the law was proposed that would give Estonian citizenship to children of non-citizen parents who have resided in Estonia for at least five years. Language requirements The perceived difficulty of the language tests became a point of international contention, as the government of the Russian Federation and a number of human rights organizations objected on the grounds that they made it hard for many Russians who had not learned the language to gain the citizenship in the short term. As a result, the tests were altered somewhat, due to which the number of stateless persons steadily decreased. According to Estonian officials, in 1992, 32% of residents lacked any form of citizenship. In May 2009, the Population register reported that 7.6% of residents have undefined citizenship and 8.4% have foreign citizenship, mostly Russian. As the Russian Federation was recognized as the successor state to the Soviet Union, all former USSR citizens qualified for natural-born citizenship of Russia, available upon mere request, as provided by the law "On the RSFSR Citizenship" in force up to the end of 2000. Politics Historically, the Estonian Centre Party has been the most popular party among Russian-speaking citizens. In 2012, it was supported by up to 75% of ethnic non-Estonians. In 2021, pundits noticed that since 2019 Conservative People's Party of Estonia support grew in the Russian community (notably in Ida-Viru County) This might be attributed to party's social conservative stance on social policy matters. By county Notable Russians from Estonia Wilhelm Küchelbecker (1797–1846), Russian patriotic poet and Decembrist (1825) revolutionary; raised in Estonia.