Another 2.6 million people slipped into poverty in the United States last year, the Census Bureau reported Tuesday, and the number of Americans living below the official poverty line, 46.2 million people, was the highest number in the 52 years the bureau has been publishing figures on it.

… The past decade was also marked by a growing gap between the very top and very bottom of the income ladder. Median household income for the bottom tenth of the income spectrum fell by 12 percent from a peak in 1999, while the top 90th percentile dropped by just 1.5 percent. Overall, median household income adjusted for inflation declined by 2.3 percent in 2010 from the previous year, to $49,445. That was 7 percent less than the peak of $53,252 in 1999. Part of the income decline over time is because of the smaller size of the American family.

This year is not likely to be any better, economists said. Stimulus money has largely ended, and state and local governments have made deep cuts to staff and to budgets for social programs, both likely to move economically fragile families closer to poverty.

Minorities were hit hardest. Blacks experienced the highest poverty rate, at 27 percent, up from 25 percent in 2009, and Hispanics rose to 26 percent from 25 percent. For whites, 9.9 percent lived in poverty, up from 9.4 percent in 2009. Asians were unchanged at 12.1 percent.

And last month, PBS ran a strong piece as part of an occasional series on inequality in America:

Watch the full episode. See more PBS NewsHour.