Entrepreneurship: Who says life is over after 55?

The graph is from this paper by Mikaela Backman & Charlie Karlsson
From the abstract

The results in this paper confirm that the rate of entrepreneurship first increases and then decreases with age. Individuals above both 55 and 64 have a positive influence on the rate of entrepreneurship at both the regional as well as the individual level. The impact is stronger in locations that are more rural.

The data is from Sweden. I first read about that here.