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 | Year Joined | Previous Conference | Year Left | Conference Joined |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Argos | Argos, IN | Dragons | 50 Marshall | 1998.0 | independent | 2008.0 | independent |
| Elkhart Christian | Elkhart, IN | Eagles | 20 Elkhart | 2004.0 | new IHSAA school | 2008.0 | independent |
| Marquette Catholic | Michigan City | Blazers | 46 LaPorte | 1998.0 | independent | 2007.0 | Greater South Shore |
| Oregon-Davis | Hamlet, IN | Bobcats | 75 Starke | 1998.0 | independent | 2008.0 | independent |
| River Forest | Lake Station | Ingots | 45 Lake | 1998.0 | Northwest Hoosier Conference | 2007.0 | Greater South Shore |
| South Central (Union Mills) | Union Mills | Satellites | 46 La Porte | 1998.0 | independent | 2003.0 | Porter County |
| Westville | Westville, IN | Blackhawks | 46 La Porte | 1998.0 | Porter County | 2008.0 | independent |
Question:
What year did the Ingots, who left after 2007, join?
Answer:
0.0