Thanks to Alumina1 and other that have commented the issue.
First, with a 5days/week approach, annual production in 2014 will be about 1200 t. It is still close to 10 % of the actual HPA world market.
Yes, I know there are a few schedule systems that allow to produce 7 days/week but in all those case you need to pay premiums salary to retain your employees. There is often shut down during winter (10 days from Dec. 24 to Jan. 4 and 14 days during summer time. So a 340 production days is also plausible. Therefore, 2014 production should be in the 1200 to 1700 t range.