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:
| No. | Season | Championship | No. of teams | Start (reg. season) | Finish (incl. championship) | Top record | National Champion |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1.0 | 2003–04 | 2004.0 | 66.0 | October 4 | April 18 | Lindenwood (21–0–1) | Lindenwood |
| 2.0 | 2004–05 | 2005.0 | 58.0 | September 11 | April 17 | Lindenwood (20–1–0) | Lindenwood |
| 3.0 | 2005–06 | 2006.0 | 57.0 | October 1 | April 9 | Lindenwood (33–0–0) | Lindenwood |
| 4.0 | 2006–07 | 2007.0 | 52.0 | October 1 | April 7 | Lindenwood (23–0–0) | Lindenwood |
| 5.0 | 2007–08 | 2008.0 | 60.0 | September 29 | April 14 | Lindenwood (19–1–0) | Lindenwood |
| 6.0 | 2008–09 | 2009.0 | 39.0 | October 4 | April 5 | Lindenwood (25–0–0) | UMSL |
| 7.0 | 2009–10 | 2010.0 | 37.0 | September 26 | April 11 | Lindenwood (23–0–0) | Lindenwood |
| 8.0 | 2010–11 | 2011.0 | 43.0 | September 25 | April 9 | Lindenwood (23–0–0) | Long Beach State |
| 9.0 | 2011–12 | 2012.0 | 44.0 | October 1 | April 14 | Lindenwood (20–0–0) | Bethel |
Question:
What season ended on April 18?
Answer:
2003–04