What is how common are happy endings?

As an AI language model, I do not have access to statistical data on how common happy endings are. However, it can be noted that happy endings are relatively common in popular fiction and media, particularly in genres such as romance, comedy, and family-friendly movies and TV shows. However, some genres such as drama, tragedy, or horror may not always have a happy ending. Additionally, some stories may have bittersweet endings, in which there is some happiness but also some sadness or loss.