According to this link of the government of Canada website, a Dataset is requested from CBSA on Oct 2, 2017 about immigration security screening timeline statistic.
Since then, the Status of this request is:
Request sent to data owner – awaiting response!
6 years and no reply from CBSA to IRCC request!!
Does any follow-up have done from IRCC ??
https://search.open.canada.ca/suggest-dataset/record/fe08f4b3-4226-4cf4-a32e-3734b78f5c73