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 | County | Enrollment 08-09 | IHSAA Class | IHSAA Class Football | Year Joined | Previous Conference |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Chesterton | Chesterton | Trojans | 64 Porter | 1921.0 | 4A | 6A | 1970.0 | Calumet |
| Crown Point | Crown Point | Bulldogs | 45 Lake | 2426.0 | 4A | 6A | 1993.0 | Lake Suburban |
| Lake Central | Saint John | Indians | 45 Lake | 3141.0 | 4A | 6A | 2003.0 | Independents |
| LaPorte | LaPorte | Slicers | 46 LaPorte | 1956.0 | 4A | 5A | 1976.0 | Northern Indiana |
| Merrillville | Merrillville | Pirates | 45 Lake | 2241.0 | 4A | 6A | 1975.0 | Lake Suburban |
| Michigan City | Michigan City | Wolves | 46 LaPorte | 1919.0 | 4A | 5A | 1995.0 | none (new school) |
| Portage | Portage | Indians | 64 Porter | 2618.0 | 4A | 6A | 1970.0 | Calumet |
| Valparaiso | Valparaiso | Vikings | 64 Porter | 2072.0 | 4A | 6A | 1970.0 | Independents |
Question:
The school of Portage was in what conference previous?
Answer:
Calumet