This is a copy of the summary of the report:
https://www.grassley.senate.gov/sit...17 State Dept. to CEG - Classified Emails.pdf
Read page 8, the last paragraph:
"
While there were some instances of classified information being inappropriately introduced into an unclassified system in furtherance of expedience, by and large, 'the individuals interviewed were aware of security policies and did their best to implement them in their operations. Correspondence with the Secretary is inherently sensitive, and is therefore open for broad interpretation as to classification, particularly with respect to Foreign Government Information.
Instances of classified information being deliberately transmitted via unclassified email were the rare exception and resulted in adjudicated security violations. There was no persuasive evidence of systemic, deliberate mishandling of classified information."
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With respect to the FBI's investigation in 2016:
The FBI had found the vast majority of the e-mails, something like 99.64% of them were unclassified, and
0.36% of them were classified, and of that 0.36% only a handful had any classified markings on them. There were something like 2,100 e-mails that were later classified.