Title: University of Michigan
Content:  The Michigan football program ranks first in NCAA history in total wins (925 through the end of the 2015 season) and first among FBS schools in winning percentage (.731). The team won the first Rose Bowl game in 1902. U-M had 40 consecutive winning seasons from 1968 to 2007, including consecutive bowl game appearances from 1975 to 2007. The Wolverines have won a record 42 Big Ten championships. The program has 11 national championships, most recently in 1997, and has produced three Heisman Trophy winners: Tom Harmon, Desmond Howard and Charles Woodson. The men's ice hockey team, which plays at Yost Ice Arena, has won nine national championships. The men's basketball team, which plays at the Crisler Center, has appeared in five Final Fours and won the national championship in 1989. The program also voluntarily vacated victories from its 1992–1993 and 1995–1999 seasons in which the payments took place, as well as its 1992 and 1993 Final Four appearances. The men's basketball team has most recently won back-to-back Big Ten Tournament Championships.
Title: Michigan Collegiate Hockey Conference
Content:  The MCHC has produced eleven National Championship teams, the most of any Division 3 conference, including Ferris State (1994), Muskegon Community College (2003), Calvin College (2004), Saginaw Valley State (2009, 2010), Adrian College-Gold (2012, 2013, 2014), Michigan State (2015), Oakland (2016), and Hope College (2018). SVSU became the first school in Division 3 history to not only win two National Championships, but to do it in back-to-back years. Adrian College-Gold later became the first school in Division 3 history to not only make three straight National Championship Games, but to win all three.
Title: Michigan Wolverines field hockey
Content:  Field hockey has been a varsity sport at the University of Michigan since 1973. From 1978 to 1988 and again from 1992 to the present, Michigan has played in the Big Ten Conference. Between 1989 and 1991, the team played in the Midwestern Collegiate Field Hockey Conference. The team won a number of major championships during the late 1990s and early 2000s, beginning with a Big Ten regular season title in 1997 and a Big Ten tournament championship in 1999. This streak of successes under head coach Marcia Pankratz culminated with the team's first and to date only national championship in 2001. The achievement was the first NCAA title won by a women's sports team at the University of Michigan, and was also just the second time a Midwestern university had claimed the championship after Iowa had done it first in 1986.
Title: Michigan State University
Content:  The Michigan State Spartans compete in the NCAA Division I Big Ten Conference. Michigan State Spartans football won the Rose Bowl Game in 1954, 1956, 1988 and 2014, and the university claims a total of six national football championships. Spartans men's basketball won the NCAA National Championship in 1979 and 2000 and has attained the Final Four eight times since the 1998–1999 season. Spartans ice hockey won NCAA national titles in 1966, 1986 and 2007. The women's cross country team was named Big Ten champions in 2019. In the fall of 2019, MSU student-athletes posted all-time highs for graduation success rates and federal graduation rates, according to NCAA statistics.
Title: Michigan Wolverines swimming and diving
Content:  The University of Michigan Men's Swimming and Diving team has a rich tradition of producing quality swimmers and being one of the nation's top programs. Men's swimming and diving has been a varsity sport at Michigan since 1921. With 19 total national championships — 12 official NCAA championships and seven unofficial NCAA national championships — the Michigan men's swimming and diving team has won more national championships than any other varsity sport in the history of the university. In addition, Michigan holds 42 Big Ten Titles in its history with its most recent title coming in the 2020-21 season. The team has won more Big Ten titles than any other program. Michigan has enjoyed great success as of late, finishing as a top-10 team in the NCAA's nine out of the last ten seasons, with its best finish coming in the 2012-13 season, in which they won the national championship. Michigan's total of 19 national championships in Swimming and Diving is the most of any team in history.
Title: 1923 NCAA Track and Field Championships
Content:  and field championship was the school's seventh collegiate athletic championship in nine months. The Atlanta Constitution reported on the unusual accomplishment as follows:"'With the winning of the National Collegiate Athletic association championship track meet at Chicago last week, the University of Michigan brought to a close one of the most successful athletic years that has been the lot of any major institution in the country, winning a total of 7 championships in the 9 months of competition. ... Michigan's track team, in addition to winning the national collegiate meet, won the conference indoor and outdoor track titles and these, coupled with the cross country championship made four championships that were brought to Michigan by the track squad.'" In the opening event 
Title: List of Big Ten Conference national championships
Content:  Prior to the NCAA sponsored championship, Michigan won 2 national titles. ° NIGA national champion
Title: Central Michigan Chippewas
Content:  The football team won the second NCAA Division II national championship in 1974 by defeating the University of Delaware 54–14. The team was voted national champion in the Associated Press College Division poll. The Chips have also been national runner-up twice. In 2006, they won the MAC Championship in against Ohio and then defeated Middle Tennessee State in the Motor City Bowl. In 2007, the team defended their MAC Championship title in the game against Miami University, but lost to Purdue in the Motor City Bowl. The team was also beaten by Florida Atlantic in the 2008 Motor City Bowl.
Title: List of Michigan sport championships
Content:  Detroit Lions win their fourth National Football League championship. ; 1962 The Muskegon Zephyrs of the International Hockey League win Muskegon's first Joseph Turner Memorial Cup IHL championship. ; 1962 The Michigan Technological University Huskies win their first NCAA hockey title. ; 1964 The Grand Rapids Tackers win the Mid-West Professional Basketball League championship. ; 1964 The University of Michigan Wolverines win their seventh NCAA hockey title (their last for 32 years). ; 1965 The Grand Rapids Tackers win their first North American Basketball League championship. ; 1965 The Michigan Tech Huskies win their second NCAA hockey title. ; 1966 The Port Huron 
Title: Michigan Wolverines football
Content:  The Michigan Wolverines football team represents the University of Michigan in college football at the NCAA Division I Football Bowl Subdivision level. Michigan has the most all-time wins in college football history. The team is known for its distinctive winged helmet, its fight song, its record-breaking attendance figures at Michigan Stadium, and its many rivalries, particularly its annual, regular season-ending game against Ohio State, known simply as “The Game,” once voted as ESPN's best sports rivalry. Michigan began competing in intercollegiate football in 1879. The Wolverines joined the Big Ten Conference at its inception in 1896, and other than a hiatus from 1907 to 1916, have been members since. Michigan has won or shared 43 league titles, and, since 

Question: when was the last time university of michigan won a national championship?
Answer: 1997.