Normal, mine jumped from 99% to 87% and then to 94% and is now 99%. All in two years.
And since the following is a good learning resource, but often gets overlooked or not even read completely, I just post it again (and will do so the next twenty two thousand times a similar question gets asked):
______________________________________________________ This should answer most, if not all, of your battery questions: Apple Notebook Battery FAQbyGGJstudios ______________________________________________________