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 | Year Joined | Previous Conference |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Angola Community | Angola | Hornets | 911.0 | AAA (AAAA) | 76 Steuben | 1989.0 | Northeastern Indiana |
| Central Noble | Albion | Cougars | 441.0 | AA | 57 Noble | 1968.0 | none (new school) |
| Churubusco | Churubusco | Eagles | 438.0 | AA | 92 Whitley | 1989.0 | Allen County |
| Eastside | Butler | Blazer | 498.0 | AA | 17 DeKalb | 1983.0 | Allen County |
| Fairfield | Goshen | Falcons | 583.0 | AA | 20 Elkhart | 1980.0 | Northern State |
| Fremont | Fremont | Eagles | 387.0 | A | 76 Steuben | 1964.0 | Steuben County |
| Hamilton | Hamilton | Marines | 228.0 | A | 76 Steuben | 1964.0 | Steuben County |
| Lakeland | LaGrange | Lakers | 747.0 | AAA | 44 LaGrange | 1973.0 | Independents |
| Prairie Heights | LaGrange | Panthers | 519.0 | AA | 44 LaGrange | 1964.0 | none (new school) |
| West Noble | Ligonier | Chargers | 685.0 | AAA | 57 Noble | 1967.0 | none (new school) |
| Westview | Topeka | Warriors | 422.0 | AA | 44 LaGrange | 1966.0 | none (new school) |
Question:
What year joined had an enrollment less than 438 and an AA as the IHSAA Class?
Answer:
1966.0