Sales from organic U.S. farms reached $5.5 billion last year, a 72 percent increase from 2008, the U.S. Agriculture Department said in a report on Thursday that highlighted the consumer trend toward such products. The USDA data, compiled through farmer surveys, showed that milk was the top organic commodity in 2014 with sales of about $1.1 billion. Sales of organic eggs, which are laid by hens raised without cages, totaled $420 million.