While official estimates count 1 million culled hogs, slaughter data suggest 100 times more will be removed from China’s 440 million-strong swine herd in 2019, the Chinese zodiac’s “year of the pig.” The U.S. Department of Agriculture forecast in April a decline of 134 million head -- equivalent to the entire annual output of American pigs -- and the worst slump since the department began counting China’s pigs in the mid 1970s.