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 | Average | High | Low | Season tickets |
| --- | --- | --- | --- | --- |
| 2001–02 Serie A | 17,956 | 27,498 | 14,704 | 12,156 |
| 2002–03 Serie A | 16,306 | 25,603 | 12,980 | 11,544 |
| 2003–04 Serie A | 15,904 | 23,663 | 11,463 | 10,439 |
| 2004–05 Serie A | 14,044 | 23,010 | 10,711 | 9,923 |
| 2005–06 Serie A | 14,372 | 23,116 | 11,575 | 10,639 |
| 2006–07 Serie A | 14,644 | 20,488 | 11,946 | 11,120 |
| 2007–08 Serie A | 15,427 | 25,149 | 11,890 | 11,386 |
| 2008–09 Serie B | 10,031 | 12,265 | 9,261 |  |
| 2009–10 Serie A | 17,061 | 21,323 | 11,870 | 13,691 |
| 2010–11 Serie A | 14,524 | 19,615 | 11,975 | 10,578 |
| 2011–12 Serie A | 13,646 | 19,481 | 10,800 | 9,620 |
| 2012–13 Serie A | 12,740 | 19,073 | 9,627 | 10,546 |
Question:
how many seasons had average attendance of at least 15,000 at the stadio ennio tardini?
Answer:
5