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 | Size | IHSAA Class | # / County | Year Joined | Previous Conference |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Cambridge City Lincoln | Cambridge City | Golden Eagles | 367.0 | AA | 89 Wayne | 1965.0 | none (new school) |
| Centerville | Centerville | Bulldogs | 530.0 | AA | 89 Wayne | 1962.0 | East Central |
| Hagerstown | Hagerstown | Tigers | 401.0 | AA | 89 Wayne | 1966.0 | Mississinewa Valley |
| Northeastern | Fountain City | Knights | 379.0 | AA | 89 Wayne | 1974.0 | Mid-Eastern |
| Tri | Straughn | Titans | 274.0 | A | 33 Henry | 1989.0 | Big Blue River |
| Union City Community | Union City | Indians | 287.0 | A | 68 Randolph | 1962.0 | East Central |
| Union County | Liberty | Patriots | 535.0 | AA | 81 Union | 1973.0 | none (new school) |
| Winchester Community | Winchester | Golden Falcons | 494.0 | AA | 68 Randolph | 1972.0 | Mississinewa Valley |
Question:
What's the size of Centerville in 89 Wayne county with an IHSAA class of AA in the year before 1974?
Answer:
530.0