We put the results of urine monitoring from January to December 2020 together. 
(N=60, We picked up only the first result of those who were monitored multiple times.)  
We totaled the results of people except 18 people whose results were N.D. this time. 

Below are the results of radiation measurement.
Since the number of samples drastically decreased due to COVID-19, we only report the
distribution by radiation levels and regions.