Question: In what year did the arena in which the 2011–12 Missouri Tigers men's basketball team played their home games open?

Context paragraphs:
2015–16 Missouri Tigers men's basketball team: The 2015–16 Missouri Tigers men's basketball team represented the University of Missouri in the 2015–16 NCAA Division I men's basketball season.  Their head coach was Kim Anderson, who was in his second year as the head coach at Missouri.  The team played its home games at Mizzou Arena in Columbia, Missouri, and played its fourth season in the Southeastern Conference.  They finished the season 10–21, 3–15 in SEC play to finish in last place.  Due to a self-imposed postseason ban, Missouri did not participate in the SEC Tournament.

Missouri Tigers men's basketball: The Missouri Tigers men's basketball team represents the University of Missouri in the SEC.  Prior to the 2012–2013 season, the basketball team represented the school in the Big 12 Conference.  They are located in Columbia, Missouri, playing home games at Mizzou Arena (15,061).  The team last played in the NCAA Division I Men's Basketball Tournament in 2013.  The Tigers' next season in 2017–18 will be their first under new head coach Cuonzo Martin, who was hired away from California to replace the fired Kim Anderson.  The Missouri men's basketball program was a charter member of the Big 12 Conference, formed from the Big Eight Conference in 1996.  Following the 2016–17 season, the Tigers had an all-time record of 1,593–1,133 and a winning percentage of .

2011–12 Missouri Tigers men's basketball team: The 2011–12 Missouri Tigers men's basketball team represented the University of Missouri in the 2011–12 NCAA Division I men's basketball season.  Their head coach was Frank Haith, who was in his 1st year at Missouri.  Haith won AP Coach of the Year honors for this season.  The team played its home games at Mizzou Arena in Columbia, Missouri and they were members of the Big 12 Conference.  It was the final year in which the Tigers participated in the Big 12 Conference, as they departed for the Southeastern Conference beginning with the 2012–13 season.

Mizzou Arena: Mizzou Arena is an indoor arena located on the south side of the campus of the University of Missouri in Columbia, Missouri.  The facility, home to the school's men's and women's basketball teams, opened in November 2004 and replaced the Hearnes Center as the school's flagship indoor sports facility.  The arena also serves as the Columbia-Springfield market's venue for well-known 'arena' acts such as Rascal Flatts, Luke Bryan and the Eagles.  The arched-roof building seats 15,061, and is located just south of Hearnes and Memorial Stadium.  The arena is host to Missouri State High School Activities Association championships for basketball and wrestling.  The arena was briefly known as Paige Sports Arena.

2009–10 Missouri Tigers men's basketball team: The 2009–10 Missouri Tigers men's basketball team represented the University of Missouri in the 2009-10 NCAA Division I men's basketball season.  Their Head Coach was Mike Anderson, who was in his 4th year at Missouri.  The team played its home games at Mizzou Arena in Columbia, Missouri and they are members of the Big 12 Conference.  The Tigers finished the season 23–11, 10–6 in Big 12 play and they lost in the first round of the 2010 Big 12 Men's Basketball Tournament.  They received an at–large bid to the 2010 NCAA Men's Division I Basketball Tournament, earning a 10 seed in the East Region.  They upset 7 seed Clemson in the first round before falling to 2 seed and AP #6 West Virginia in the second round.

2014–15 Missouri Tigers men's basketball team: The 2014–15 Missouri Tigers men's basketball team represented the University of Missouri in the 2014–15 NCAA Division I men's basketball season.  Their head coach was Kim Anderson, who was in his first year as the head coach at Missouri.  The team played its home games at Mizzou Arena in Columbia, Missouri, and played its third season in the Southeastern Conference.  They finished the season 9–23, 3–15 in SEC play to finish in last place.  They lost in the first round of the SEC Tournament to South Carolina.

2016–17 Missouri Tigers men's basketball team: The 2016–17 Missouri Tigers men's basketball team represented the University of Missouri in the 2016–17 NCAA Division I men's basketball season.  Their head coach was Kim Anderson, who was in his third year as the head coach at Missouri.  The team played its home games at Mizzou Arena in Columbia, Missouri, and was in its fifth season in the Southeastern Conference.  They finished the season 8–24, 2–16 in SEC play to finish in a tie for 13th place.  As the No. 14 seed in the SEC Tournament, they defeated Auburn in the first round before losing in the second round to Ole Miss.

2010–11 Missouri Tigers men's basketball team: The 2010–11 Missouri Tigers men's basketball team represented the University of Missouri in the 2010-11 NCAA Division I men's basketball season.  Their Head Coach was Mike Anderson, who was in his 5th year at Missouri.  The team played its home games at Mizzou Arena in Columbia, Missouri and they are members of the Big 12 Conference.  They finished the season 23–11, 8–8 in Big 12 play and lost in the quarterfinals of the 2011 Big 12 Men's Basketball Tournament to Texas A&M.  They received an at-large bid in the 2011 NCAA Men's Division I Basketball Tournament where they lost in the second round to Cincinnati.

2013–14 Missouri Tigers men's basketball team: The 2013–14 Missouri Tigers men's basketball team represented the University of Missouri in the 2013–14 NCAA Division I men's basketball season.  Their head coach was Frank Haith, who was in his third and final year at Missouri.  The team played its home games at Mizzou Arena in Columbia, Missouri, and was playing its second season in the Southeastern Conference.

2012–13 Missouri Tigers men's basketball team: The 2012–13 Missouri Tigers men's basketball team represented the University of Missouri in the 2012–13 NCAA Division I men's basketball season.  Their head coach was Frank Haith, who was in his second year at Missouri.  The team played its home games at Mizzou Arena in Columbia, Missouri, and played its first season in the Southeastern Conference after leaving the Big 12 Conference.

Supporting paragraphs: 2011–12 Missouri Tigers men's basketball team Mizzou Arena
Answer: 2004