Every time your birthday passes and people throw a party, it means they didn't think you'd live a whole year more. As though you not doing something worthy of a Darwin Award for a whole year is a noteworthy accomplishment for you. That's the kid of faith your friends and family have in you. They expected you to go fishing with dynamite. They expected you to huff too much gas or try to do a tightrope walk across the Grand Canyon. But you showed them. You continued working your boring, safe, non-threatening job and diligently avoid getting killed in one of a million horrible ways. Good for you.
But they didn't think you'd make it. Even when you prove your modicum of intelligence by not attempting to parachute with an umbrella, you let them down by failing to live up to their meager expectations of your and your impending doom. That is why birthdays are the most pessimistic of all holidays.
You have been informed.