The Comoro Islands are not registered in the EPR ETHZ GROW UP Dataset. Therefore, no politically relevant ethic groups are display for this country. 
According to the Nation Online website, the relevant ethnic groups are: Antalote, Cafre, Makoa, Oimatsaha, Sakalava (http://www.nationsonline.org/one world/comoros.htm - Access: 2016-03-22)
According to Wikipedia, they are: African-Arab, Malagasy, Indians, French, Chinese, Dutch, British and Portuguese.
After the military coup of Lieut. Jammeh. Jammeh, he and his hegemonic party won all the subsequent elections. Ethnicity is therefore deemed as irrelevant in Gambia since 1994 by EPR ETHZ GrowUp.
Ethnicity is coded as irrelvant by the EPR ETHZ GrowUp dataset before the emergence of ethnic conflicts in the 1980s.
Following the 1992 constitutional change, indigeneous people were not politically discriminated anymore. However, none of them have been appointed or elected before 2008.
1) https://en.wikipedia.org/wiki/Administrative_divisions_of_Moldova ; 2) https://growup.ethz.ch/pfe/Moldova
No changes occurred in the domination of the administrative units after 1980, and the Arab Muslims have already monopolized the political power before this date.
The Armenians dominate the autonomous Republic and the Azeri the eleven cities. However, this was already the case before 1999, and no changes occurred in this pattern after this date.
The Byelorussians and the Russians dominated the 7 administrative units before 1997, and this pattern did not change after this date. 
The Byelorussians are coded as senior partners and the Russians as junior partners in the EPR ETHZ GROWNUP dataset. This means that the Byelorussians held a stronger grip over political power that the Russians. However, there were no clearer information about the exact number of administrative units dominated by each of these groups. As the Byelorussians and the Russians are to be equally found in the entire country, this precise number cannot be infer from their geographical repartition.
The Whites still dominated the political institutions and the administrative units in Brazil, but the establishment of a new constitution in 1988 gave rise to an Afro-Brazilians organized political movement. The EPR ETHZ GROWNUP Dataset provides us with an example of one Afro-Brazilian political leader elected at the regional level. From this example, it is clear that the Afro-Brazilians gained control over some states, but the gathered sources are not detailed enough to estimate their exact number.
Warning : according to  Deiwiks, Christa and Cederman, Lars-Erik and Kristian Skrede Gleditsch (2012) data's, there are 15 administrative units are controlled by Indigeneous People and 5 by Ecuadorians. 
Source :  Deiwiks, Christa and Cederman, Lars-Erik and Kristian Skrede Gleditsch (2012), "Inequality and Conflict in Federations", Journal of Peace Research Vol 49, pp 289-304.
1) https://en.wikipedia.org/wiki/Provinces_of_Zambia ; 2) https://growup.ethz.ch/pfe/Zambia ;  3) Deiwiks, Christa and Cederman, Lars-Erik and Kristian Skrede Gleditsch (2012), "Inequality and Conflict in Federations", Journal of Peace Research Vol 49, pp 289-304.
Mecahnisms of power sharing were introduced in Benin after the establishement of a new electoral system in 1991. Therefore, the Northern groups are no longer the leading party in the government.
The domination pattern suffers no changes after 1992. The Ngalops were already the ruling class and held a monopoly over the political power before this date.
The Serbs dominate the Republic of Srpka, and the Bosniaks and the Croats the Federation of Bosnia-Herzegovia. The special district seems to be equally divided between the Serbs and the Bosniaks/Croats. 
This new domination pattern was produced by the Dayton Agreement (December 14, 1995), which also put an end to the civil war.
1) https://en.wikipedia.org/wiki/Provinces_of_South_Africa ; 2) https://growup.ethz.ch/pfe
The precise number of administrative units dominated by each ethnic group was not available in the consulted sources.
The precise number of administrative units dominated by each ethnic group was not available in the consulted sources. They are thus recorded under the MAJORITY/SOME/0 categories to reflect the EPR ETHZ GROWNUP Dataset classification (Senior partners, junior partners and powerless).
Fabien Cottier "Environmental, Migration, Political Marginalization and Violence''
1) https://en.wikipedia.org/wiki/Governorates_of_Lebanon ; 2) https://growup.ethz.ch/pfe/Lebanon ;  3) Deiwiks, Christa and Cederman, Lars-Erik and Kristian Skrede Gleditsch (2012), "Inequality and Conflict in Federations", Journal of Peace Research Vol 49, pp 289-304.
Warning : the estimates and the number of administrative units provided by Cottier are not the same as the ones displayed by Deiwiks, Christa and Cederman, Lars-Erik and Kristian Skrede Gleditsch (2012) = Ovambo 3 / Mawfe 1 / San 2 / Herero 5 / Nama 7 / Baster 3 /Kavango 2