We have a recent rule in our institution that at least two papers need to be published in SCI journals for being awarded a doctorate degree.
Students were well aware about the rule since the first year of their PhD degree. I called it a recent rule because the university never had this rule prior to this, and this is the first batch of students to whom it applies.
Almost 95% of the students do not have a SCI journal publication in the last year of their PhD. Those who do are from physics or physics. Almost all the rest belongs to computer-science subjects like cryptography, machine learning etc.
We do not have any statistics regarding the possibility of publishing two papers in the last year by PhD students since the rule is relatively new. So, stats of seniors are not much helpful for us. Most of the seniors published their research papers in the last year of their PhD. But, almost all of these publications are in non-SCI journals. So, their stats are no longer relevant to us.
Many users may answer that it totally depends on the student, supervisor, environment etc., But one can observe that only 5% of students get their papers published in their early years and 95% didn't have any progress in publications. So, I am hoping that there would be statistics related to this phenomenon.
Is there any survey or stats regarding this? What percentage of students get their papers published in standard journals in their last year of PhD?