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:
| Season | Tier | Division | Place |
| --- | --- | --- | --- |
| 1963–86 | 5 | Regional | — |
| 1986/87 | 5 | Preferente | 2nd |
| 1987/88 | 4 | 3ª | 15th |
| 1988/89 | 4 | 3ª | 15th |
| 1989/90 | 4 | 3ª | 17th |
| 1990/91 | 4 | 3ª | 12th |
| 1991/92 | 4 | 3ª | 18th |
| 1992/93 | 5 | Preferente | 1st |
| 1993/94 | 4 | 3ª | 14th |
| 1994/95 | 4 | 3ª | 16th |
| 1995/96 | 4 | 3ª | 19th |
| 1996/97 | 5 | Preferente | 1st |
| 1997/98 | 4 | 3ª | 7th |
| 1998/99 | 4 | 3ª | 18th |
Question:
how many years did they place 15th or lower?
Answer:
7