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 | Pos. | Notes |
| --- | --- | --- | --- | --- |
| 2003–04 | 1 | División de Honor | 1st | League champion |
| 2004–05 | 1 | División de Honor | 2nd | Cup champion |
| 2005–06 | 1 | División de Honor | 3rd |  |
| 2006–07 | 1 | División de Honor | 3rd |  |
| 2007–08 | 1 | División de Honor | 1st | League champion |
| 2008–09 | 1 | División de Honor | 3rd |  |
| 2009–10 | 1 | División de Honor | 2nd |  |
| 2010–11 | 1 | División de Honor | 2nd |  |
| 2011–12 | 1 | División de Honor | 9th | Relegated |
| 2012–13 | 3 | Primera Nacional | 1st |  |
| 2013–14 | 3 | Primera Nacional |  |  |
Question:
what was the least successful season?
Answer:
2011-12