Jacob Raphael Druckman (June 26, 1928 – May 24, 1996) was an American composer born in Philadelphia.
 A graduate of the Juilliard School, Druckman studied with Vincent Persichetti, Peter Mennin, and Bernard Wagenaar.
 In 1949 and 1950 he studied with Aaron Copland at Tanglewood and later continued his studies at the École Normale de Musique in Paris (1954–55).
 He worked extensively with electronic music, in addition to a number of works for orchestra or for small ensembles.
 In 1972 he won the Pulitzer Prize for his first large orchestral work, "Windows".
 He was composer-in-residence of the New York Philharmonic from 1982 until 1985.
 Druckman taught at Juilliard, The Aspen Music Festival, Tanglewood, Brooklyn College, Bard College, and Yale University, among other appointments.
 He is Connecticut's State Composer Laureate.
Herman Spielter (April 20, 1860 – November 10, 1925) was an American composer born in Germany who came to the United States in 1880.
 He wrote cantatas and other works for choir as well as some chamber music.
Paul Fetler is an American composer born in 1920.
 He received his bachelor's degree from Northwestern University and was taught composition by David Van Vactor.
 Following his bachelor's, Fetler earned a master's degrees from Yale, and then accepted a position at the University of Minnesota where he obtained his doctorate.
 In addition to Vactor, Fetler also studied with Paul Hindemith, Quincy Porter, and Boris Blacher, and taught many composers at Minnesota including Eric Stokes, Donald Keats, Michael Schelle, Stephen Paulus, Libby Larsen, and Carol Barnett.
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Ross Lee Finney Junior (December 23, 1906–February 4, 1997) was an American composer born in Wells, Minnesota who taught for many years at the University of Michigan.
 He received his early training at Carleton College and the University of Minnesota and also studied with Nadia Boulanger, Edward Burlingame Hill, Alban Berg (from 1931-2) and Roger Sessions (in 1935).
 In 1928 he spent a year at Harvard University and then joined the faculty at Smith College, where he founded the Smith College Archives and conducted the Northampton Chamber Orchestra.
 In 1935, his setting of poems by Archibald MacLeish won the Connecticut Valley Prize, and in 1937, his "First String Quartet" received a Pulitzer Scholarship Award.
 A Guggenheim Fellowship funded travel in Europe in 1937.
 During World War II, Finney served in the Office of Strategic Services, and received a Purple Heart and a Certificate of Merit.
Elizabeth Gyring (1886–1970) was an American composer born in Vienna, the daughter of laryngologist Leopold Rethy.
 She studied with Joseph Marx and Ludwig Gzaczkes at the Vienna Academy of Music and had successful premieres as a composer in Berlin and Vienna.
 She married Otto Geiringer, and in 1939 the couple emigrated to the United States where Gyring became a citizen.
 She died in New York City in 1970, and her papers are housed at Washington State University.
The Concerto Project is a collection of concerti written by Philip Glass.
 The series was begun in 2000 and contains eight works, the most famous of which is probably the "Concerto for Cello and Orchestra".
 Some of the concerti in the volumes were written before the commencement of the project and were categorized into the series.
George Rosenkrans (Jan 17, 1881-Aug.
 18, 1955) was a noted American composer of concert band music.
 He was born in Penfield, Pennsylvania on January 17, 1881.
 His father was the music director of the local Methodist church, and George sang with the choir and learned to play the organ there.
 His first compositions included organ music and hymns.
 He also played the baritone horn in the town band, and eventually became the conductor.
 He composed his first march at age 17, and was soon turning out as many as 8 new marches each year.
 As interest in his music declined, he would sell new arrangements for as little as 50 cents, or give compositions away outright.
 In later life, he composed many works for the Grampian Band in nearby Grampian, Pennsylvania, his favorite group, including the "Grampian March".
 He missed a 1948 tribute by the Navy Band because he didn't believe he had any suitable clothes.
 He died in poverty in Penfield on August 18, 1955.
Philip Morris Glass (born January 31, 1937) is an American composer.
 He is widely regarded as one of the most influential musicians of the late 20th century.
Michael Kibbe (born 1945) is an American contemporary classical music composer born in San Diego, California.
 He has composed over 240 concert works and created numerous arrangements.
 His writing covers many musical styles, encompassing tonal, modal and non-diatonic languages.
 His style often incorporates modern structures but is still accessible to the popular classical listener.
 Some of his works come right of the Romantic Era yet his style in some writings has been compared to Prokofiev.
 There are influences of American composer Gershwin in the Serenade Number 2 for two clarinets that seem at once blues, jazz and classical.
 His music can often reflect themes that bring to mind different cultures.
Fred Onovwerosuoke (born 1960) is an American composer born in Ghana of Nigerian parents.
 He is a multiple winner of the ASCAP Award, among other awards such as the America Music Center Award, Brannen-Cooper Fund Award, and the Minnesota Orchestra Honorable Mention.
 “FredO,” as he is called by friends and colleagues was born in Secondi-Takoradi, near the Atlantic Coast in Ghana, West Africa.
 Early childhood and education through college years were spent in both Ghana and Nigeria.
 In 1990, he attended Principia College, Elsah, Illinois, on a full scholarship, and while there studied music theory and 20th Century composition techniques under Jim Dowcett, as well as Engineering Science and Computer programming with David Cornell and Tom Fuller.
 Although Onovwerosuoke has had a wide-ranging training that spans composition, electrical and electronic engineering, information technology, management and musicology, he is known to attribute his interest in music to his childhood as boy-soprano and to his high-school music teacher, Sam Anyanele, who instilled him a deep love of indigenous African music.
 His tutelage under Dowcett at Principia was said to unleash a creative individualism that eventually evolved into a career as a composer with works that bear influences from Africa, the Caribbean and the American Deep South.

Question: How many works where made in 2000 by an American composer born on January 31, 1937?
Answer: eight