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the average for the 12-month period ending on April 30 in the preceding year of the Average Weekly Earnings for each month in that period
the average for the 12-month period ending on April 30 in the preceding year of the Average Weekly Earnings for each month in that period
the average for the 12-month period ending on March 31 in the preceding year of the Average Weekly Earnings for each month in that period
the average for the 12-month period ending on April 30 in the preceding year of the Average Weekly Earnings for each month in that period
the average for the twelve month period ending on June 30 in the preceding year of the Average Weekly Earnings for each month in that period