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 |
| --- | --- | --- | --- | --- | --- |
| Virginia 3 | Henry St. George Tucker | Democratic-Republican | 1815 | Retired Democratic-Republican hold | Jared Williams (DR) 64.6% John Smith (DR) 35.4% |
| Virginia 4 | William McCoy | Democratic-Republican | 1811 | Re-elected | William McCoy (DR) 100% |
| Virginia 5 | John Floyd | Democratic-Republican | 1817 | Re-elected | John Floyd (DR) 100% |
| Virginia 6 | Alexander Smyth | Democratic-Republican | 1817 | Re-elected | Alexander Smyth (DR) 100% |
| Virginia 7 | Ballard Smith | Democratic-Republican | 1815 | Re-elected | Ballard Smith (DR) |
| Virginia 8 | Charles F. Mercer | Federalist | 1817 | Re-elected | Charles F. Mercer (F) 100% |
| Virginia 11 | Philip P. Barbour | Democratic-Republican | 1814 (special) | Re-elected | Philip P. Barbour (DR) 100% |
| Virginia 12 | Robert S. Garnett | Democratic-Republican | 1817 | Re-elected | Robert S. Garnett (DR) |
| Virginia 13 | Burwell Bassett | Democratic-Republican | 1815 | Retired Democratic-Republican hold | Severn E. Parker (DR) John Drury |
| Virginia 14 | William A. Burwell | Democratic-Republican | 1806 (special) | Re-elected | William A. Burwell (DR) |
| Virginia 15 | William J. Lewis | Democratic-Republican | 1817 | Retired Democratic-Republican hold | George Tucker (DR) 72.2% John Kerr (DR) 27.8% |
| Virginia 17 | James Pleasants | Democratic-Republican | 1811 | Re-elected | James Pleasants (DR) |
| Virginia 19 | John Pegram | Democratic-Republican | 1818 ( special ) | Lost re-election Democratic-Republican hold | James Jones (DR) 70.6% John Pegram (DR) 29.4% |
| Virginia 20 | James Johnson | Democratic-Republican | 1813 | Re-elected | James Johnson (DR) 100% |
| Virginia 21 | Thomas Newton, Jr. | Democratic-Republican | 1797 | Re-elected | Thomas Newton, Jr. (DR) 100% |
| Virginia 22 | Hugh Nelson | Democratic-Republican | 1811 | Re-elected | Hugh Nelson (DR) |
Question:
How many times is the candidates charles f. mercer (f) 100%?
Answer:
1.0