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:
| School | Location | Mascot | Enrollment | IHSAA Class | County | Primary Conference |
| --- | --- | --- | --- | --- | --- | --- |
| Eastern Hancock | Charlottesville | Royals | 348.0 | A | 30 Hancock | Mid-Hoosier |
| Indian Creek | Trafalgar | Braves | 598.0 | AAA | 41 Johnson | Mid-Hoosier |
| Knightstown | Knightstown | Panthers | 397.0 | A | 32 Henry | Mid-Hoosier |
| Milan | Milan | Indians | 417.0 | AA | 69 Ripley | Ohio River Valley |
| North Decatur | Greensburg | Chargers | 397.0 | AA | 16 Decatur | Mid-Hoosier |
| South Decatur | Greensburg | Cougars | 316.0 | A | 16 Decatur | Mid-Hoosier |
Question:
Which Enrollment has a Primary Conference of mid-hoosier, and a County of 16 decatur, and an IHSAA Class of aa?
Answer:
397.0