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 |
| --- | --- | --- | --- | --- | --- |
| Illinois 9 | Sidney Yates | Democratic | 1948 , 1964 | Re-elected | Sidney Yates (D) 63.40% Joseph Walsh (R) 36.60% |
| Illinois 10 | John Porter | Republican | 1980 | Re-elected | John Porter (R) 69.09% Philip Torf (D) 30.91% |
| Illinois 11 | Jerry Weller | Republican | 1994 | Re-elected | Jerry Weller (R) 51.77% Clem Balanoff (D) 48.23% |
| Illinois 13 | Harris Fawell | Republican | 1984 | Re-elected | Harris Fawell (R) 59.93% Susan Hynes (D) 40.06% |
| Illinois 14 | Dennis Hastert | Republican | 1986 | Re-elected | Dennis Hastert (R) 64.39% Doug Mains (D) 35.60% |
| Illinois 15 | Thomas Ewing | Republican | 1991 | Re-elected | Thomas Ewing (R) 57.33% Laurel Prussing (D) 42.67% |
| Illinois 18 | Ray LaHood | Republican | 1994 | Re-elected | Ray LaHood (R) 59.25% Mike Curran (D) 40.75% |
Question:
what's the total number of candidates for first elected in 1948 , 1964
Answer:
1.0