FRANKFURT: German industrial production decreased slightly in November, weighed down by falling activity in the manufacturing sector, the economy ministry said on Friday. The ministry calculated that factory output contracted by 0.3 per cent in November compared with a month earlier, corrected for seasonal factors. In October, output had increased by 0.5 per cent. Manufacturing output was down by 0.8 per cent month-on-month, while construction output increased by 1.6 per cent and energy output was up 2.5 per cent, the ministry said.