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:
| District | Incumbent | Party | First elected | Result | Candidates |
| --- | --- | --- | --- | --- | --- |
| Georgia 2 | Maston E. O'Neal, Jr. | Democratic | 1964.0 | Re-elected | Maston E. O'Neal, Jr. (D) Unopposed |
| Georgia 3 | Jack Thomas Brinkley | Democratic | 1966.0 | Re-elected | Jack Thomas Brinkley (D) Unopposed |
| Georgia 6 | John James Flynt, Jr. | Democratic | 1954.0 | Re-elected | John James Flynt, Jr. (D) Unopposed |
| Georgia 7 | John W. Davis | Democratic | 1960.0 | Re-elected | John W. Davis (D) Unopposed |
| Georgia 8 | W. S. Stuckey, Jr. | Democratic | 1966.0 | Re-elected | W. S. Stuckey, Jr. (D) Unopposed |
| Georgia 9 | Phillip M. Landrum | Democratic | 1952.0 | Re-elected | Phillip M. Landrum (D) Unopposed |
Question:
What is the highest year that a candidate was first elected?
Answer:
1966.0