Of course it doesn't, HBAR isn't listed under PROC BOXPLOT, HBAR stands for horizontal bar so not sure why you think that makes sense here either.
Take a look at the documentation first, they have an example that's really close to yours.
Note that the issue is the structure of your data. Determine how to change your data structure to match theirs and you can use the exact code in the documentation (hint: PROC TRANSPOSE).
https://documentation.sas.com/?docsetId=statug&docsetTarget=statug_boxplot_examples02.htm&docsetVers...
Note that at the top of the page, there's a link to the full code if you want, which gets you the full program to run and play with.