According to the firm, 2.7 million African-American households (out of about 11 million) have access to the Internet, whether it be from home, work or school.

For African-American households, it is just the opposite: at every income level, from $30,000 to $120,000, more couples are penalized than benefit.

(Only when annual income exceeds $120,000 are there more married African-American households receiving a bonus than a penalty.)

The series followed an African-American household of three generations.

The show's rating in African-American households, 9.5, is about 36 percent lower than the show's national average.

"Unsung" has enjoyed steady growth in African-American households as each season has aired.

In 2001, over half of African-American households of married couples earned $50,000 or more.

Understanding how so many African-American households have experienced such downward mobility seems critical to figuring out ways to help them.

That change meant the difference between a fourth-place and first-place ranking for "Girlfriends" among African-American households.

Raised exclusively in an African-American household and community setting, growing up the singer had little to no interaction with whites outside of those related to her.