How many times has Iowa University been to the NCAA tournament?

Iowa has made 22 appearances in the NCAA Men's Basketball Tournament: 1955, 1956, 1970, 1979, 1980, 1981, 1982, 1983, 1985, 1986, 1987, 1988, 1989, 1991, 1992, 1993, 1996, 1997, 1999, 2001, 2005 and 2006.