The group integral dose of nuclear workers (the sum of the integral dose of all the plant workers, people・Sv) turned to be 16 times bigger than 2009.
The group integral dose from 3.2011 to 2.2012 was 244.6 people・Sv, which was 14.9 people・Sv in 2009. It went up to 120.2 people・Sv only in the first month of 3.2011.
The average integral dose of the same term was 12 mSv (20,000 workers), which was 1.4 mSv in 2009 (10,000 workers).