I installed exchange reporter on december 2015, but the reports only shows data from June 2016

I installed exchange reporter on december 2015, but the reports only shows data from June 2016

Hi, i check out the scheduled task history and doesn´t show tasks earlier than june.
The status of all the task are successful.
Does the data collected from this tasks ( traffic log, owa log, mailbox account,etc) is purged automatically?

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