The nation's median family income in 1987 reached $30,850, rising 1 percent from 1986 after inflation and narrowly exceeding the previous high mark of 1973, the Census Bureau reported.

At the same time, however, the increase was concentrated among white families while the medians for black and Hispanic families remained stagnant at $18,100 and $20,310, respectively, the bureau reported.Moreover, the annual survey found median household income - that of single earners as well unrelated persons in a household - was $25,990, essentially unchanged from 1986 after adjusting for a 3.7 percent inflation rate.

Median income is a line at which half the households earned more and half earned less during the year, the last period for which figures were available. The bureau's report is a more detailed look at numbers first released in August.