As of September this year (2017) I have been posting for eight years.
Granted, there have been times when the posts have been a bit sparse. But the bottom line is that this site has been alive for eight years.
A couple of searches on the Web will tell you that the average life of a blog site is apparently 100 days or three months (depending on which site you check). So eight years is well an truly a good life for a blog site.