pre_text: Issuer Purchases of Equity Securities The following table contains information about shares of our previously-issued common stock that we withheld from employees upon vesting of their stock-based awards during the fourth quarter of 2019 to satisfy the related tax withholding obligations:
table: Total Number of Shares Withheld for Taxes Average Price Paid Per Share
table: Period
table: October 2019 16,585 $11.57
table: November 2019 185,887 13.15
table: December 2019 12,368 13.70
table: Total 214,840
question: Analyse this data from a financial earnings document. What is the average number of shares withheld for taxes per month?