The profit shares of two companies $P$ and $Q$ are shown in the figure. If the two companies have invested a fixed and equal amount every year, then the ratio of the total revenue of company $P$ to the revenue of company $Q$, during $2013-2018$ is ________.
- $15 : 17$
- $16 : 17$
- $17 : 15$
- $17 : 16$