[Table] header: District | Incumbent | Party | First elected | Results row 1 : California 1 | Mike Thompson | Democratic | 1998 | Re-elected
row 2 : California 2 | Wally Herger | Republican | 1988 | Re-elected
row 3 : California 3 | Dan Lungren | Republican | 1998 | Re-elected
row 4 : California 4 | John Doolittle | Republican | 1990 | Re-elected
row 5 : California 5 | Doris Matsui | Democratic | 2005 | Re-elected
row 6 : California 6 | Lynn Woolsey | Democratic | 1992 | Re-elected
row 7 : California 7 | George Miller | Democratic | 1974 | Re-elected
row 8 : California 8 | Nancy Pelosi | Democratic | 1987 | Re-elected
row 9 : California 9 | Barbara Lee | Democratic | 1998 | Re-elected
row 10 : California 10 | Ellen Tauscher | Democratic | 1996 | Re-elected
row 11 : California 11 | Richard Pombo | Republican | 1992 | Lost re-election Democratic gain
row 12 : California 12 | Tom Lantos | Democratic | 1980 | Re-elected
row 13 : California 13 | Pete Stark | Democratic | 1972 | Re-elected
row 14 : California 14 | Anna Eshoo | Democratic | 1992 | Re-elected
row 15 : California 15 | Mike Honda | Democratic | 2000 | Re-elected
row 16 : California 16 | Zoe Lofgren | Democratic | 1994 | Re-elected
row 17 : California 17 | Sam Farr | Democratic | 1992 | Re-elected
row 18 : California 18 | Dennis Cardoza | Democratic | 2002 | Re-elected
row 19 : California 19 | George Radanovich | Republican | 1996 | Re-elected
row 20 : California 20 | Jim Costa | Democratic | 2004 | Re-elected
row 21 : California 21 | Devin Nunes | Republican | 2000 | Re-elected
row 22 : California 22 | Bill Thomas | Republican | 1978 | Retired Republican hold
row 23 : California 23 | Lois Capps | Democratic | 1998 | Re-elected
row 24 : California 24 | Elton Gallegly | Republican | 1986 | Re-elected
row 25 : California 25 | Howard McKeon | Republican | 1992 | Re-elected
row 26 : California 26 | David Dreier | Republican | 1980 | Re-elected
row 27 : California 27 | Brad Sherman | Democratic | 1996 | Re-elected
row 28 : California 28 | Howard Berman | Democratic | 1982 | Re-elected
row 29 : California 29 | Adam Schiff | Democratic | 2000 | Re-elected
row 30 : California 30 | Henry Waxman | Democratic | 1974 | Re-elected
row 31 : California 31 | Xavier Becerra | Democratic | 1992 | Re-elected
row 32 : California 32 | Hilda Solis | Democratic | 2000 | Re-elected
row 33 : California 33 | Diane Watson | Democratic | 2001 | Re-elected
row 34 : California 34 | Lucille Roybal-Allard | Democratic | 1992 | Re-elected
row 35 : California 35 | Maxine Waters | Democratic | 1990 | Re-elected
row 36 : California 36 | Jane Harman | Democratic | 1986 | Re-elected
row 37 : California 37 | Juanita Millender-McDonal | Democratic | 1996 | Re-elected
row 38 : California 38 | Grace Napolitano | Democratic | 1998 | Re-elected
row 39 : California 39 | Linda Sánchez | Democratic | 2002 | Re-elected
row 40 : California 40 | Ed Royce | Republican | 1992 | Re-elected
row 41 : California 41 | Jerry Lewis | Republican | 1978 | Re-elected
row 42 : California 42 | Gary Miller | Republican | 1998 | Re-elected
row 43 : California 43 | Joe Baca | Democratic | 1999 | Re-elected
row 44 : California 44 | Ken Calvert | Republican | 1992 | Re-elected
row 45 : California 45 | Mary Bono | Republican | 1998 | Re-elected
row 46 : California 46 | Dana Rohrabacher | Republican | 1988 | Re-elected
row 47 : California 47 | Loretta Sanchez | Democratic | 1996 | Re-elected
row 48 : California 48 | John Campbell | Republican | 2005 | Re-elected
row 49 : California 49 | Darrell Issa | Republican | 2000 | Re-elected
row 50 : California 50 | Brian Bilbray | Republican | 2006 | Re-elected
row 51 : California 51 | Bob Filner | Democratic | 1992 | Re-elected
row 52 : California 52 | Duncan Hunter | Republican | 1980 | Re-elected
row 53 : California 53 | Susan Davis | Democratic | 2000 | Re-elected [/Table] Answer this question based on the above table: What is the earliest first elected date of incumbent howard mckeon?

Answer: 1992.0