Yearly baselines are not recommended. There are two major drawbacks to yearly baselines.
1. In order to restore you would need to have the baseline and all the incrementals up to the point in time you want to restore from. Loading those would take a very long time.
2. If one of the incrementals fails then you will need to create a new baseline using up more space and requiring your to keep track of more backups.
One baseline per month is about as far as push out baselines. Weekly baselines are generally the best way to go.
