The U.S. Jewish population rose slightly last year to an estimated 5.9 million, representing 2.5 percent of the overall population, reports the 1988 Jewish Yearbook.

Biggest gains were reported in the Sunbelt and West Coast areas, with a 50,000 increase in the San Francisco-Oakland-San Jose area, and 30,000 increase in Florida.Of 15 states reporting a drop in Jewish population, New York, whose 1,891,400 make it the highest Jewish concentration, had the greatest absolute loss, down 20,000.

Biggest relative loss occurred in Mississippi, which fell from 3,005 to 2,400 Jews.