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 | Title | U.S. | U.S. R&B | U.S. dance |
| --- | --- | --- | --- | --- |
| 1984.0 | " Pretty Mess " | 75 | 15 | 13 |
| 1985.0 | " Mechanical Emotion " | 107 | 23 | — |
| 1986.0 | " Under the Influence " | 56 | 9 | 6 |
| 1986.0 | "Animals" | — | — | — |
| 1988.0 | "Undress" | — | — | — |
Question:
What value for U.S. dance occurred in 1986 when the value of U.S. R&B was 9?
Answer:
6.0