Iowa: 3.1%. According to our research of Iowa and other state lists there were 2 registered sex offenders living in Aurora, Iowa as of September 06, 2015. The ratio of number of residents in Aurora to the number of sex offenders is 86 to 1.
William G. Sumner, who coined the term ethnocentrism, is famously known as America's first sociology professor. He taught social sciences at the Yale University. It is wondrous, really, how this world is made up of so many different people belonging to different races or ethnicities.
Although self-aggrandizement theories may be relevant to all six expressions of ethnocentrism, it seems that the intergroup expressions are most directly relevant. It is quite likely that in ex-Yugoslavia self-aggrandizement has in part created and increased ethnocentrism in the ethnic group members.