lasted from 1966 to 1975, expanded upon the aims of the civil rights movement to include economic and political self-sufficiency, and freedom from White authority. During the post-war period, many African Americans continued to be economically disadvantaged relative to other Americans. Average Black income stood at 54 percent of that of White workers in 1947, and 55 percent in 1962. In 1959, median family income for Whites was $5,600, compared with $2,900 for non-White families. In 1965, 43 percent of all Black families fell into the poverty bracket, earning under $3,000 a year. The Sixties saw improvements in the social and economic conditions of many Black Americans. From 1965 to 1969, Black family income rose from 54 to 60 percent of White family income. In 1968, 23 percent of Black families earned under $3,000 a year, compared with 41 percent in 1960. In 1965, 19 percent of Black Americans had incomes equal to the national median, a proportion that rose to 27 percent by 1967. In 1960, the median level of education for Blacks had been 10.8 years, and by the late Sixties the figure rose to 12.2 years, half a year behind the median for Whites. Post–civil rights era Politically and economically, African Americans have made substantial strides during the post–civil rights era. In 1967, Thurgood Marshall became the first African American Supreme Court Justice. In 1968, Shirley Chisholm became the first Black woman elected to the U.S. Congress. In 1989, Douglas Wilder became the first African American elected governor in U.S. history. Clarence Thomas succeeded Marshall to become the second African American Supreme Court Justice in 1991. In 1992, Carol Moseley-Braun of Illinois became the first African American woman elected to the U.S. Senate. There were 8,936 Black officeholders in the United States in 2000, showing a net increase of 7,467 since 1970. In 2001, there were 484 Black mayors. In 2005, the number of Africans immigrating to the United States, in a single year, surpassed the peak number who were involuntarily brought to the United States during the Atlantic Slave Trade. On November 4, 2008, Democratic Senator Barack Obama defeated Republican Senator John McCain to become the first African American to be elected president. At least 95 percent of African American voters voted for Obama. He also received overwhelming support from young and educated Whites, a majority of Asians, and Hispanics, picking up a number of new