Table:
text: United States Ambassador to India
Chiefs of Mission to India
Chiefs of Mission to India
Name_ State_ Status_ Title Appointment Credentials_Presented Termination_of_Mission Notes_
William B. Saxbe Ohio Non-career appointee Ambassador Extraordinary and Plenipotentiary Feb 3, 1975 Mar 8, 1975 Left post, Nov 20, 1976 
Robert F. Goheen New Jersey Non-career appointee Ambassador Extraordinary and Plenipotentiary Apr 26, 1977 May 26, 1977 Left post, Dec 10, 1980 
Harry G. Barnes, Jr. Maryland Foreign Service officer Ambassador Extraordinary and Plenipotentiary Oct 1, 1981 Nov 17, 1981 Left post, Jun 27, 1985 
John Gunther Dean New York Foreign Service officer Ambassador Extraordinary and Plenipotentiary Aug 2, 1985 Sep 6, 1985 Left post Nov 7, 1988 
John R. Hubbard California Non-career appointee Ambassador Extraordinary and Plenipotentiary Nov 22, 1988 Dec 27, 1988 Left post Nov 15, 1989 Commissioned during a recess of the Senate.

text: United States Ambassador to India
Chiefs of Mission to India
Chiefs of Mission to India
Name_ State_ Status_ Title Appointment Credentials_Presented Termination_of_Mission Notes_
William Clark, Jr. District of Columbia Foreign Service officer Ambassador Extraordinary and Plenipotentiary Oct 10, 1989 Dec 22, 1989 Left post, Jul 2, 1992 
Thomas R. Pickering New Jersey Foreign Service officer Ambassador Extraordinary and Plenipotentiary Apr 6, 1992 Aug 14, 1992 Left post, Mar 23, 1993 Kenneth Brill served as Chargé d`Affaires ad interim, Mar 1993-Aug 1994.
Frank G. Wisner District of Columbia Foreign Service officer Ambassador Extraordinary and Plenipotentiary Jun 9, 1994 Aug 2, 1994 Left post, July 12, 1997 
Richard Frank Celeste Ohio Non-career appointee Ambassador Extraordinary and Plenipotentiary Nov 10, 1997 Nov 28, 1997 Left post Apr 25, 2001 
Robert Blackwill Kansas Non-career appointee Ambassador Extraordinary and Plenipotentiary Jul 12, 2001 Sep 14, 2001 Left post Jul 31, 2003 

text: United States Ambassador to India
Chiefs of Mission to India
Chiefs of Mission to India
Name_ State_ Status_ Title Appointment Credentials_Presented Termination_of_Mission Notes_
David Campbell Mulford Illinois Non-career officer Ambassador Extraordinary and Plenipotentiary Dec 12, 2003 Feb 23, 2004 Left post February 2009 
Timothy J. Roemer Indiana Non-career appointee Ambassador Extraordinary and Plenipotentiary Jul 23, 2009 Aug 11, 2009 Left post June 30, 2011 
Albert Peter Burleigh California Foreign Service officer Chargé d`affaires June 2011 Left post 2012  
Nancy Jo Powell Iowa Foreign Service officer Ambassador Extraordinary and Plenipotentiary February 7, 2012 April 19, 2012  

text: United States Ambassador to India
Chiefs of Mission to India
Chiefs of Mission to India
Name_ State_ Status_ Title Appointment Credentials_Presented Termination_of_Mission Notes_
Chester Bowles Connecticut Non-career appointee Ambassador Extraordinary and Plenipotentiary Oct 10, 1951 Nov 1, 1951 Left post, Mar 23, 1953 Also accredited to Nepal; resident at New Delhi.
George V. Allen North Carolina Foreign Service officer Ambassador Extraordinary and Plenipotentiary Mar 11, 1953 May 4, 1953 Left post, Nov 30, 1954 Also accredited to Nepal; resident at New Delhi.
John Sherman Cooper Kentucky Non-career appointee Ambassador Extraordinary and Plenipotentiary Feb 4, 1955 Apr 9, 1955 Left post, Apr 23, 1956 Also accredited to Nepal; resident at New Delhi.

text: United States Ambassador to India
Chiefs of Mission to India
Chiefs of Mission to India
Name_ State_ Status_ Title Appointment Credentials_Presented Termination_of_Mission Notes_
Henry F. Grady California Non-career appointee Ambassador Extraordinary and Plenipotentiary Apr 10, 1947 Jul 1, 1947 Left post, Jun 22, 1948 Accredited also to Nepal; resident at New Delhi.
Loy W. Henderson Colorado Foreign Service officer Ambassador Extraordinary and Plenipotentiary Jul 14, 1948 Nov 19, 1948 Reaccredited when India became a republic; presented new credentials Feb 24, 1950; left post Sep 21, 1951 Commissioned during a recess of the Senate; recommissioned after confirmation on Mar 2, 1949. Also accredited to Nepal; resident at New Delhi.

Question: How many chiefs of the United States Ambassadors to India are listed as foreign service officers?