why is it so

I was down the pub whem a mate of mine pulled this question on me. He said it doesn't matter who you ask the answer will be 111


I am 59 years old born in 1952, if you add year of birth 1952 not the 19 part, plus how old I am this this year 49 you get 111. It always adds up to 111. Its only for this year for everybody. WHY??????????????

Maybe when I wake up in the morning it will be obvious, atm its a pretty good party joke.