I think the number of ITAs are a wrong indicator of how many draws will be happening for the rest of the year.
This is the link for the target of new permanent residents in 2017 under individual categories. They have a target of welcoming 74,000 individuals this year under the categories which concern us. This is the official data on the CIC website, and as more than 25-30% of the ITAs are not converted in PRs. I believe this is no need to publish or point out that only 77,000 ITAs are to be issued this year.
http://www.cic.gc.ca/English/department/media/notices/2016-10-31.asp
This is number of PRs to be issued this year under the FSW, PNP, CEC categories not the number of ITAs.