On a proportionate basis, tenured faculty has declined significantly: from 46% to 22% in the USA since 1975.[1] So, what was traditionally a 50/50 shot at tenure, Now it is a 80/20 long-shot. At the margin, tenured track positions are actually even rarer. Recall, of the 22% most of them are not recent hires. So, you're odds may be as low as 9/10 against you getting a tenure job...assuming you got any "faculty job" at all. Since the latter is also decreasingly likely, given a supply glut/relatively, the odds of getting an academic job that is also a tenure job are lower yet.
[1] This data is cited above.
