Writing income for novelists

I just ran across this writeup by Jim C. Hines on his writing income throughout his career. (See also 2020.) Some things I notice:

• This is the first year (at least in about four years) that his US income was more than his foreign sales and royalties.
• He still has a day job.
• Short fiction isn’t a big source of income for him.
• In 2010, e-book income made up about 3 to 5 percent of the royalties.

And while we’re on the subject, see Unasked-for Advice to New Writers About Money from John Scalzi, who made $164,000 in 2007.