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\nelected | Result | Candidates |
| --- | --- | --- | --- | --- | --- |
| Pennsylvania 1 | Harry C. Ransley | Republican | 1920 | Re-elected | Harry C. Ransley (R) 52.1%\nJoseph Marinelli (D) 47.2%\nGamshei Kutlikoff (S) 0.4%\nMorris H. Wickman (C) 0.3% |
| Pennsylvania 2 | James M. Beck | Republican | 1927 | Resigned\nRepublican hold | William H. Wilson (R) 54.7%\nJames P. McGranery (D) 44.5%\nHarriet Norris (S) 0.6%\nJoseph Mackie (Proh) 0.2% |
| Pennsylvania 3 | Alfred M. Waldron | Republican | 1932 | Retired\nRepublican hold | Clare G. Fenerty (R) 52.0%\nMichael Joseph Bradley (D) 46.8%\nAlfred M. Waldron (Industrial Recovery) 0.6%\nJoseph Kazmark (S) 0.5%\nRose E. Landberg (Prog) 0.1% |
| Pennsylvania 4 | George W. Edmonds | Republican | 1932 | Lost re-election\nDemocratic gain | J. Burrwood Daly (D) 49.6%\nGeorge W. Edmonds (R) 49.2%\nWilliam Eckel (S) 0.7%\nSterling T. Rochester (C) 0.4%\nCharles Fred White (Prog) 0.08% |
| Pennsylvania 5 | James J. Connolly | Republican | 1920 | Lost re-election\nDemocratic gain | Frank Joseph Gerard Dorsey (D) 52.2%\nJames J. Connolly (R) 46.7%\nWarren D. Mullin (S) 1.0%\nArthur Braun (C) 0.2% |
| Pennsylvania 6 | Edward L. Stokes | Republican | 1931 | Retired to run for Governor\nDemocratic gain | Michael J. Stack (D) 50.8%\nRobert L. Davis (R) 48.2%\nJohn P. Innerarity (S) 0.6%\nBen Gardner (C) 0.2%\nRomain C. Hassrick (Proh) 0.2%\nBenjamin J. Spang (Prog) 0.06% |
| Pennsylvania 7 | George P. Darrow | Republican | 1914 | Re-elected | George P. Darrow (R) 52.7%\nJames C. Crumlish (D) 46.4%\nJoseph Doerr (S) 0.7%\nT. Henry Walnut (Proh) 0.1%\nWilliam F. Kane (Prog) 0.08% |
| Pennsylvania 8 | James Wolfenden | Republican | 1928 | Re-elected | James Wolfenden (R) 57.2%\nJohn E. McDonough (D) 41.3%\nEdward B. Rawson (S) 1.0%\nC. Wilfred Conard (Proh) 0.6% |
| Pennsylvania 9 | Oliver W. Frey | Democratic | 1933 | Re-elected | Oliver W. Frey (D) 50.2%\nTheodore R. Gardner (R) 47.6%\nWalter L. Huhn (S) 1.6%\nManda M. Horlacker (Proh) 0.4%\nSteven Pukanecz (C) 0.2% |
| Pennsylvania 10 | J. Roland Kinzer | Republican | 1930 | Re-elected | J. Roland Kinzer (R) 57.6%\nCharles T. Carpenter (D) 41.7%\nWilliam W. Halligan (S) 0.7% |
| Pennsylvania 11 | Patrick J. Boland | Democratic | 1930 | Re-elected | Patrick J. Boland (D) 98.1%\nEdwin S. Williams (Proh) 1.5%\nJoseph Dougher (C) 0.4% |
| Pennsylvania 12 | Charles Murray Turpin | Republican | 1929 | Re-elected | Charles Murray Turpin (R) 51.4%\nJohn J. Casey (D) 48.0%\nJudson N. Bailey (Proh) 0.5%\nJohn A. Muldowney (C) 0.2% |
| Pennsylvania 13 | George F. Brumm | Republican | 1928 | Died in office\nDemocratic gain | James H. Gildea (D) 50.1%\nDavid W. Bechtel (R) 45.7%\nSusan I. Brumm (Equal Rights) 2.7%\nLeo Sitko (S) 1.3%\nEdith L. Reed (Proh) 0.3% |
| Pennsylvania 14 | William Emanuel Richardson | Democratic | 1932 | Re-elected | William Emanuel Richardson (D) 63.3%\nRaymond S. Hofses (S) 32.2%\nRobert S. MacDonough (I) 4.5% |
| Pennsylvania 15 | Louis T. McFadden | Republican | 1914 | Lost re-election\nDemocratic gain | Charles E. Dietrich (D) 50.1%\nLouis T. McFadden (R) 49.3%\nHenry L. Springer (S) 0.5% |
| Pennsylvania 16 | Robert F. Rich | Republican | 1930 | Re-elected | Robert F. Rich (R) 53.0%\nPaul A. Rothfuss (D) 44.4%\nGeorge L. Reeder (Peoples) 1.7%\nRobert I. Fisher (S) 0.9% |
| Pennsylvania 17 | J. William Ditter | Republican | 1932 | Re-elected | J. William Ditter (R) 56.2%\nHoward J. Dager (D) 42.0%\nGeorge W. Bause (S) 1.3%\nRaymond J. Keisen (Proh) 0.5% |
| Pennsylvania 18 | Benjamin K. Focht | Republican | 1932 | Re-elected | Benjamin K. Focht (R) 55.6%\nB. Stiles Duncan (D) 44.4% |
| Pennsylvania 19 | Isaac Hoffer Doutrich | Republican | 1926 | Re-elected | Isaac Hoffer Doutrich (R) 55.1%\nForrest Mercer (D) 42.9%\nIrving J. Noon (S) 0.9%\nIda G. Kast (Proh) 0.9%\nAlbert W. Penner (I) 0.1% |
| Pennsylvania 20 | Thomas Cunningham Cochran | Republican | 1926 | Retired\nDemocratic gain | Denis J. Driscoll (D) 52.7%\nLeon H. Gavin (R) 43.7%\nRobert G. Burnham (Proh) 2.8%\nRobert S. Stewart (S) 0.8% |
| Pennsylvania 21 | Francis E. Walter | Democratic | 1932 | Re-elected | Francis E. Walter (D) 58.7%\nT. Fred Woodley (R) 40.0%\nSimon R. Hartzell (S) 1.3% |
| Pennsylvania 22 | Harry L. Haines | Democratic | 1930 | Re-elected | Harry L. Haines (D) 54.6%\nEmanuel C. Beck (R) 43.7%\nWilliam P. Gemmil (Proh) 1.0%\nHarry Boeckel (S) 0.8% |
| Pennsylvania 23 | J. Banks Kurtz | Republican | 1922 | Lost re-election\nDemocratic gain | Don Gingery (D) 52.4%\nJ. Banks Kurtz (R) 44.2%\nGeorge W. Hartman (S) 3.4% |
| Pennsylvania 24 | J. Buell Snyder | Democratic | 1932 | Re-elected | J. Buell Snyder (D) 57.3%\nPaul H. Griffith (R) 42.0%\nCharles H. Musgrove (S) 0.6%\nVictor Dellarose (C) 0.2% |
| Pennsylvania 25 | Charles I. Faddis | Democratic | 1932 | Re-elected | Charles I. Faddis (D) 59.4%\nAlbert S. Sickman (R) 38.6%\nHuber Ferguson (Proh) 1.7%\nFred Siders (C) 0.4% |
| Pennsylvania 26 | J. Howard Swick | Republican | 1926 | Lost re-election\nDemocratic gain | Charles R. Eckert (D) 59.1%\nJ. Howard Swick (R) 40.0%\nCharles Baldwin (S) 0.9% |
| Pennsylvania 27 | Nathan Leroy Strong | Republican | 1916 | Lost re-election\nDemocratic gain | Joseph Anthony Gray (D) 54.4%\nNathan Leroy Strong (R) 44.5%\nFinley S. Goldthwaite (S) 1.1% |
| Pennsylvania 28 | William M. Berlin | Democratic | 1932 | Re-elected | William M. Berlin (D) 92.5%\nS. W. Bierer (Proh) 3.8%\nMorris Mallinger (S) 3.8% |
| Pennsylvania 29 | Charles N. Crosby | Democratic | 1932 | Re-elected | Charles N. Crosby (D) 52.5%\nWill Rose (R) 45.6%\nRalph W. Tillotson (S) 0.9%\nFrank H. Selden (Proh) 0.9%\nLeo Mittelmeier (C) 0.2% |
| Pennsylvania 30 | J. Twing Brooks | Democratic | 1932 | Re-elected | J. Twing Brooks (D) 53.4%\nEdmund Frederick Erk (R) 45.0%\nSarah Z. Limbach (S) 1.1%\nWilliam G. Hohman (Proh) 0.5% |
| Pennsylvania 31 | Melville Clyde Kelly | Republican | 1916 | Lost re-election\nDemocratic gain | James L. Quinn (D) 52.4%\nMelville Clyde Kelly (R) 45.6%\nWilliam Adams (S) 1.3%\nLaura Jane Grubbs (C) 0.7% |
| Pennsylvania 32 | Michael J. Muldowney | Republican | 1932 | Lost re-election\nDemocratic gain | Theodore L. Moritz (D) 43.6%\nMichael J. Muldowney (R) 34.4%\nAlexander Schullman (I) 15.2%\nAnne E. Felix (Honest Elections) 5.2%\nJames H. Hueston, Sr. (S) 1.0%\nBen Careathers (C) 0.6% |
| Pennsylvania 33 | Henry Ellenbogen | Democratic | 1932 | Re-elected | Henry Ellenbogen (D) 95.3%\nLoudoun L. Campbell (I) 2.1%\nFrank A. Van Essen (S) 1.9%\nGeorge Harger (Proh) 0.8% |
| Pennsylvania 34 | Matthew A. Dunn | Democratic | 1932 | Re-elected | Matthew A. Dunn (D) 89.2%\nGuy E. Campbell (R) 6.8%\nJohn W. Slayton, Sr. (S) 1.8%\nCharles R. Murray (Ind Cit) 1.4%\nLouis C. Clark (Proh) 0.8% |
Question:
how many of these congressmen were re-elected?
Answer:
21