The post is the search, and it changes every year. A page per post with the current call, the number of places and the exam date reaches people the week the announcement appears.
Results are the argument, and vague ones destroy credibility. Publishing how many of your students passed against how many places existed is uncomfortable and it is exactly what candidates compare.
The gap between the call and the exam is where the decision happens. Content published before the call is what ranks when thousands search on the same morning.