A company had 30 direct production employees at the beginning of last year and 20 direct production employees at the end of the year. During the year, a total of 15 direct production employees had left the company to work for a local competitor. What is the labour turnover rate for last year?
 
  A 16.70%
  B 20.0%
  C 25.0%
  D 60.0%

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