Rabies Shot Price I Went To Get My Dog The Re-vacciantion On The Rabies And The Price Jumped Dramatically Why?

I went to get my dog the re-vacciantion on the rabies and the price jumped dramatically why? - rabies shot price

Last year, the shot was $ 10 and another 10-15 for the label. It is now $ 20 for the vaccine, and about 25-40 dollars for the label. We are required to be labeled, if we our dog in the neighborhood on foot and dog park. I am curious to know why the vaccine would be a real need.