How long does the "average" blackbird live?

I know there are countless factors to consider, but what is the average lifespan of a male blackbird in the wild? My garden resident blackbird will be 6 years old this summer at the very youngest - I have photographic evidence of him being a fully grown adult in summer 2005, which means he was born in 2004 at the earliest (I know it's him because he has some very distinctive white feathers on his head) - he may have been around before that but that's when I got my camera, so no evidence from before then (and my memory isn't that good!).

 

I was just curious as to whether he's doing well, age-wise?

Here he is in a picture from a couple of years ago, he always looks scruffy but I love him :)