Question: The 2001 Colorado Buffaloes football team played in the playoff game that was first played during what stretch of years?

full_context: Document 1: 2010 Big 12 Championship Game: The 2010 Big 12 Championship Game was played at 7:00 p.m. on Saturday, December 4, 2010, at AT&T Stadium, then known as Cowboys Stadium, in Arlington, Texas to determine the 2010 football champion of the Big 12 Conference. At that time, it was the final championship game for the conference as two members of the Big 12 had announced their intentions to leave the conference. The South Division was represented by Oklahoma and the North Division was represented by Nebraska. Oklahoma defeated Nebraska 23-20 to win the final Big 12 Championship and claim their seventh Big 12 Title. It was Oklahoma's eighth appearance in the game.
Document 2: 1974 Colorado Buffaloes football team: The 1974 Colorado Buffaloes football team was an American football team that represented the University of Colorado at Boulder in the Big Eight Conference (Big 8) during the 1974 NCAA Division I football season. In their first season under head coach Bill Mallory, the Buffaloes compiled a 5–6 record (3–4 against Big 8 opponents), finished in fifth place in the Big 8, and were outscored by their opponents, 307 to 226. The team played its home games at Folsom Field in Boulder, Colorado.
Document 3: 2002 Colorado Buffaloes football team: The 2002 Colorado Buffaloes football team represented the University of Colorado at Boulder during the 2002 NCAA Division I-A football season. The team played their home games at Folsom Field in Boulder, Colorado. They participated in the Big 12 Conference in the North Division. They were coached by head coach Gary Barnett. Colorado played in the Big 12 Championship Game for the second time, but lost to Oklahoma.
Document 4: Big 12 Conference football: The Big 12 Conference is a conference of 10 (originally 12) universities which participate in the National Collegiate Athletic Association's Division I Football Bowl Subdivision football. The conference was formed in 1994 but did not begin conference play until the fall of 1996. The schools that compose the Big 12 Conference, except West Virginia, were members of either the Big Eight Conference or the Southwest Conference, and have won 21 national titles including 3 titles since the inception of the Big 12 Conference.
Document 5: 2006 Big 12 Championship Game: The 2006 Dr. Pepper Big 12 Championship Game was held on December 2, 2006 at Arrowhead Stadium in Kansas City, Missouri, and pit the divisional winners from the Big 12 Conference: the Nebraska Cornhuskers, winner of the North division against the Oklahoma Sooners, winner of the South division. The Sooners defeated the Cornhuskers, 21-7. This was the first time the two teams had ever met in the Big 12 conference championship game.
Document 6: 2004 Colorado Buffaloes football team: The 2004 Colorado Buffaloes football team represented the University of Colorado at Boulder in the 2004 NCAA Division I-A football season. The team played their home games in Folsom Field in Boulder, Colorado. They participated in the Big 12 Conference in the North Division. They were coached by head coach Gary Barnett.
Document 7: 2012 Colorado Buffaloes football team: The 2012 Colorado Buffaloes football team represented the University of Colorado Boulder during the 2012 NCAA Division I FBS football season. Led by second-year head coach and alumnus Jon Embree, the Buffaloes played their home games on-campus at Folsom Field in Boulder and were members of the Pac-12 Conference. On November 25, 2012, head coach Jon Embree was fired after compiling a 4–21 record including 1–11 in his final year, the worst year in the history of Colorado Buffaloes football.
Document 8: 1996 Big 12 Championship Game: The 1996 Dr Pepper Big 12 Championship Game was held on December 7, 1996, at The Dome at America's Center, then known as Trans World Dome, in St. Louis, Missouri. The divisional winners from the Big 12 Conference squared off in the 1st edition of the game. The Texas Longhorns represented the South Division and the Nebraska Cornhuskers represented the North Division. Texas won the contest 37–27, keyed by a daring 4th down conversion from their own 28-yard line with slightly more than 2 minutes left in the 4th quarter when the score was 30–27 in their favor.
Document 9: 2010 Colorado Buffaloes football team: The 2010 Colorado Buffaloes football team represented the University of Colorado in the 2010 NCAA Division I FBS football season. The team was coached by fifth-year head coach Dan Hawkins for the first nine games and interim head coach Brian Cabral for the final three games. Colorado played their homes game at Folsom Field. It was also the final season as members the Big 12 Conference in the North Division for Colorado, before joining the Pac-12 Conference for the 2011 season. The Buffaloes failed to qualify for a bowl game, as they finished the season 5–7, 2–6 in Big 12 play.
Document 10: 2001 Colorado Buffaloes football team: The 2001 Colorado Buffaloes football team represented the University of Colorado at Boulder during the 2001 NCAA Division I-A football season. The team played their home games at Folsom Field in Boulder, Colorado. They participated in the Big 12 Conference in the North Division. They were coached by head coach Gary Barnett. Colorado played in the Big 12 Championship Game for the first time and secured its first BCS bowl berth.
Document 11: 2000 Big 12 Championship Game: The 2000 Big 12 Football Championship Game was played on December 2, 2000 in Arrowhead Stadium in Kansas City, Missouri. The game determined the 2000 football champion of the Big 12 Conference. The Oklahoma Sooners, winners of the South division of the Big 12, narrowly beat the Kansas State Wildcats, who won the North division, by a score of 27-24. This was the first time the two teams met in the Big 12 Championship Game, as they would meet again in the 2003 edition.
Document 12: Big 12 Conference Baseball Tournament: The Big 12 Conference Baseball Tournament (sometimes known simply as the Big 12 Tournament) is the conference championship tournament in baseball for the Big 12 Conference. Going back to the original format abandoned in 2005, the tournament consists of two separate four-team double-elimination tournaments. The winners of each of those tournament face each other in a one-game match for the championship. The winner receives the conference's automatic bid to the NCAA Division I Baseball Tournament.
Document 13: 2005 Colorado Buffaloes football team: The 2005 Colorado Buffaloes football team represented the University of Colorado at Boulder in the 2005 NCAA Division I-A football season. The previous year's team won the Big 12 North Conference. That marked the third Big 12 North championship for the Buffaloes in four years. The team had expectations to improve on their winning and appeared to be on the right track with a 7–2 record to begin the season. But in the end, head coach Gary Barnett had his contract bought out and Colorado suffered four straight losses including an embarrassing 70–3 loss to Texas in the Big 12 Championship Game. They finished the season 7–6. In the 2005 Champs Sports Bowl against Clemson, Mike Hankwitz acted as interim head coach, even though Dan Hawkins had been hired as the new head coach. Hawkins coached his final game with Boise State in the game the day after Colorado played.
Document 14: List of Colorado Buffaloes head football coaches: The Colorado Buffaloes football program represents the University of Colorado Boulder in the Pac-12 Conference South Division of the National Collegiate Athletic Association. The team has had 25 head coaches since it started playing organized football in 1890. The university adopted the nickname "Buffaloes" in 1934 after previously being known as the "Silver and Gold", "Silver Helmets", "Yellow Jackets", "Hornets", "Arapahoes", "Big Horns", "Grizzlies" and "Frontiersmen". Colorado played without a head coach during their first four years. The team first joined a conference in 1893 when they became a member of the Colorado Football Association. They joined the Colorado Faculty Athletic Conference in 1909, immediately followed by the Rocky Mountain Athletic Conference in 1910. Before the 1938 season, Colorado joined the Mountain States (Skyline) Conference. They joined the Big Seven Conference in 1948, which was renamed the Big Eight Conference in 1958 when Oklahoma State joined/rejoined the Conference. The Buffaloes became a charter member of the Big 12 in 1996 when the Big Eight disbanded. The Buffaloes have played in 1,139 games during their 120 seasons. In those seasons, nine coaches have led Colorado to postseason bowl games: Bunny Oakes, Dallas Ward, Bud Davis, Eddie Crowder, Bill Mallory, Bill McCartney, Rick Neuheisel, Gary Barnett, and Dan Hawkins. Nine coaches have won conference championships with the Buffaloes: Fred Folsom, Myron Witham, William Saunders, Oakes, Jim Yeager, Sonny Grandelius, Mallory, McCartney, and Barnett.
Document 15: Big 12 Championship Game: The Big 12 Championship Game is a college football game held by the Big 12 Conference. The game was played each year since the conference's formation in 1996 until 2010 and will return starting with the 2017 season. From 1996 to 2010 the championship game pitted the Big 12 North Division champion against the South Division champion in a game held after the regular season was completed. From 2017 onward, the game will feature the two teams with the best records within the conference.
ground_truth: 1996 until 2010