How old is the narrator from private peaceful now?

The narrator from Private Peaceful is currently 88 years old. The novel is set in 1914, and the narrator, Tommo Peaceful, is 16 years old at the start of the story. The novel ends in 1918, so Tommo would have been 20 at the end of the story. Since the novel was published in 2004, the character would now be 116 years old.