BRUSSELS, Aug 4 - Euro zone producer prices slipped by 0.1 percent in June for an annual rise of 1.4 percent, the European Union statistics office said on Monday. The figures were exactly in line with analysts' expectations. Eurostat revised the annual rise in May to show a rise of 1.4 percent compared with an originally reported rise of 1.3 percent. But the monthly figures was unchanged at minus 0.4 percent. Energy prices continue to be volatile with prices in the energy sector rising 0.4 percent in June for an annual rise of 3.1 percent. This compares with a 1.9 percent fall in May from April for an annual rise of 1.8 percent.