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:
| Name | Position | Period | Appearances¹ | Goals¹ | Nationality² |
| --- | --- | --- | --- | --- | --- |
| Robert Jacques | Forward | 1985 – 1986 | 28.0 | 6.0 | France |
| Christophe Jallet | Defender | 2009 – | 180.0 | 9.0 | France |
| Gérard Janvion | Defender | 1983 – 1985 | 50.0 | 0.0 | France |
| Philippe Jean | Defender | 1977 – 1979 | 14.0 | 0.0 | France |
| Philippe Jeannol | Defender | 1984 – 1991 | 219.0 | 15.0 | France |
Question:
How many periods had 15 goals?
Answer:
1.0