Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Start | Qual | Rank | Finish | Laps |
| --- | --- | --- | --- | --- | --- |
| 1958 | 32 | 143.272 | 13 | 15 | 151.0 |
| 1960 | 33 | 143.215 | 24 | 33 | 11.0 |
| 1961 | 31 | 144.202 | 31 | 16 | 145.0 |
| 1963 | 30 | 147.832 | 33 | 11 | 200.0 |
| Totals | Totals | Totals | Totals | Totals | 507.0 |
Question:
What's the Finish rank of 31?
Answer:
16.0