What is the typical lifespan of a Pekingese?

My Pekingese is 17 and a half years old, and I’m curious about his life expectancy. Does anyone know how long a Pekingese can live? I’ve had him since I was 23years old, and now I’m 40, so we’ve been together for quite some time. Google says their average lifespan is around 15 years, but I’m wondering if there are any examples of Pekingese living longer.