What is your approximate class rank? Even if your school does not rank, it is highly likely that the general range (top 10%? top20%? top 50%?) will be conveyed by the GC, or decipherable by colleges you apply to based on the school profile. That information will help people chance you.
What are your SAT and/or ACT scores? Even if you are applying TO, it will help those here if we know it, to get a sense of where you will academically fit. Even without scores, I would bet Vassar Adcoms will be able to figure out an estimate of your academic ability, and whether you’d be a successful student.