Question: What percent of people use Russian as their main language in the country where Sergey Borisenko was born?

full_context: Document 1: Sergei Kopylov: He competed for the Soviet Union in the 1980 Summer Olympics held in Moscow, Soviet Union in the individual sprint event, where he finished in third place. In 1981, he won the world amateur sprint championship gold medal. In 1982, he successfully defended his title against his main rival of the time, East Germany's Lutz Heßlich. In 1983, he focused on the 1 km time trial, capturing the world championship in Switzerland. The Soviet boycott of the 1984 Los Angeles Olympics prevented him from competing for an Olympic gold medal.
Document 2: Ryan Berube: Ryan Thomas Berube (born December 26, 1973) is an American former competition swimmer and freestyle specialist who won the gold medal anchoring the U.S. men's team in the 4×200-meter freestyle relay at the 1996 Summer Olympics in Atlanta, Georgia.
Document 3: Sergey Polynskiy: Polynskiy qualified for the Russian squad, in two track cycling events at the 2008 Summer Olympics in Beijing by receiving a berth from the UCI Track World Rankings. In the men's team sprint, held on the first day of the track program, Polynskiy and his teammates Denis Dmitriev and Sergey Kucherov battled in an opening heat against the Aussies (led by five-time Olympic veteran Shane Kelly) with a twelfth-place time in 45.964 and an average speed of 59.647 km/h, failing to advance further to the top eight match round. The following day, in the men's Keirin, Polynskiy could not ignite a late surge on the final stretch to defeat against three other cyclists Kiyofumi Nagai of Japan, Andrii Vynokurov of Ukraine, and Ricardo Lynch of Jamaica for the semifinal spot in the repechage.
Document 4: Russian language: According to figures published in 2006 in the journal "Demoskop Weekly" research deputy director of Research Center for Sociological Research of the Ministry of Education and Science (Russia) Arefyev A. L., the Russian language is gradually losing its position in the world in general, and in Russia in particular. In 2012, A. L. Arefyev published a new study "Russian language at the turn of the 20th-21st centuries", in which he confirmed his conclusion about the trend of further weakening of the Russian language in all regions of the world (findings published in 2013 in the journal "Demoskop Weekly"). In the countries of the former Soviet Union the Russian language is gradually being replaced by local languages. Currently the number speakers of Russian language in the world depends on the number of Russians in the world (as the main sources distribution Russian language) and total population Russia (where Russian is an official language).
Document 5: Russian language: In the 20th century, Russian was mandatorily taught in the schools of the members of the old Warsaw Pact and in other countries that used to be satellites of the USSR. In particular, these countries include Poland, Bulgaria, the Czech Republic, Slovakia, Hungary, Albania, former East Germany and Cuba. However, younger generations are usually not fluent in it, because Russian is no longer mandatory in the school system. According to the Eurobarometer 2005 survey, though, fluency in Russian remains fairly high (20–40%) in some countries, in particular those where the people speak a Slavic language and thereby have an edge in learning Russian (namely, Poland, Czech Republic, Slovakia, and Bulgaria).
Document 6: Russian language: Ethnic Russians constitute 25.5% of the country's current population and 58.6% of the native Estonian population is also able to speak Russian. In all, 67.8% of Estonia's population can speak Russian. Command of Russian language, however, is rapidly decreasing among younger Estonians (primarily being replaced by the command of English). For example, if 53% of ethnic Estonians between 15 and 19 claim to speak some Russian, then among the 10- to 14-year-old group, command of Russian has fallen to 19% (which is about one-third the percentage of those who claim to have command of English in the same age group).
Document 7: Sergey Borisenko: Sergey Borisenko (; born May 28, 1971) is a retired male freestyle swimmer from Kazakhstan. He competed in two consecutive Summer Olympics for his native country, starting in 1996 (Atlanta, Georgia). His best Olympic result was finishing in 21st place at the 2000 Summer Olympics in the Men's 4 × 100 m Freestyle Relay event, alongside Andrey Kvasov, Pavel Sidorov, and Igor Sitnikov.
Document 8: Boris Steimetz: Boris Steimetz (born July 27, 1987 at Saint-Denis, Réunion) is a French swimmer. He was part of the silver medal winning team of the 4 × 100 metre freestyle relay at the 2008 Summer Olympics, after he swam in the heats.
Document 9: Sikhounxay Ounkhamphanyavong: Described as "the big name of Laotian swimming", he represented his country at the 2000 Summer Olympics in Sydney, in the men's 50 metre freestyle. He had trained in one of the world's poorest countries, "where the largest pool is 25 meters long – half the Olympic distance". A reporter for the Australian Broadcasting Corporation noted that "a 25m pool badly in need of cleaning is [his] only place to train." Ounkhamphanyavong finished last in his heat, with a time of 27.03, and did not advance to the semi-finals.
Document 10: Andrey Gavrilov: Andrey Gavrilov (; born May 4, 1974) is a retired male butterfly swimmer from Kazakhstan. He competed in two consecutive Summer Olympics for his native country, starting in 1996 (Atlanta, Georgia). His best Olympic result was finishing in 15th place at the 1996 Summer Olympics in the Men's 4 × 100 m Medley Relay event.
Document 11: Russian language: In Georgia Russian has no official status, but it's recognised as a minority language under the Framework Convention for the Protection of National Minorities. According to estimates from Demoskop Weekly, in 2004 there were 130,000 native speakers of Russian in the country, and 1.7 million active speakers. 27% of the population was fluent in Russian in 2006, and 1% used it as the main language with family, friends or at work. Russian is the language of 9% of the population according to the World Factook. Ethnologue cites Russian as the country's de facto working language.
Document 12: Russian language: Significant Russian-speaking groups also exist in Western Europe. These have been fed by several waves of immigrants since the beginning of the 20th century, each with its own flavor of language. The United Kingdom, Spain, Portugal, France, Italy, Belgium, Greece, Brazil, Norway, and Austria have significant Russian-speaking communities. According to the 2011 Census of Ireland, there were 21,639 people in the nation who use Russian as a home language. However, of this only 13% were Russian nationals. 20% held Irish citizenship, while 27% and 14% were holding the passports of Latvia and Lithuania respectively.
Document 13: Russian language: In Ukraine, Russian is seen as a language of inter-ethnic communication, and a minority language, under the 1996 Constitution of Ukraine. According to estimates from Demoskop Weekly, in 2004 there were 14,400,000 native speakers of Russian in the country, and 29 million active speakers. 65% of the population was fluent in Russian in 2006, and 38% used it as the main language with family, friends or at work. Russian is spoken by 29.6% of the population according to a 2001 estimate from the World Factbook. 20% of school students receive their education primarily in Russian.
Document 14: Russian language: In Armenia Russian has no official status, but it's recognised as a minority language under the Framework Convention for the Protection of National Minorities. According to estimates from Demoskop Weekly, in 2004 there were 15,000 native speakers of Russian in the country, and 1 million active speakers. 30% of the population was fluent in Russian in 2006, and 2% used it as the main language with family, friends or at work. Russian is spoken by 1.4% of the population according to a 2009 estimate from the World Factbook.
Document 15: Russian language: In Kazakhstan Russian is not a state language, but according to article 7 of the Constitution of Kazakhstan its usage enjoys equal status to that of the Kazakh language in state and local administration. According to estimates from Demoskop Weekly, in 2004 there were 4,200,000 native speakers of Russian in the country, and 10 million active speakers. 63% of the population was fluent in Russian in 2006, and 46% used it as the main language with family, friends or at work. According to a 2001 estimate from the World Factbook, 95% of the population can speak Russian. Large Russian-speaking communities still exist in northern Kazakhstan, and ethnic Russians comprise 25.6% of Kazakhstan's population. The 2009 census reported that 10,309,500 people, or 84.8% of the population aged 15 and above, could read and write well in Russian, as well as understand the spoken language.
ground_truth: 46%
sub_queries: What was Sergey Borisenko birth country? Answer: Kazakhstan
What percent of people in Kazakhstan use Russian as their main language? Answer: 46%