Question: How many public universities are a part of the system which held the 1949 NCAA Swimming and Diving Championships ?

Context articles: 1961 NCAA Swimming and Diving Championships
1959 NCAA Swimming and Diving Championships
2011 European Diving Championships
University of North Carolina
1949 NCAA Swimming and Diving Championships
1926 NCAA Swimming and Diving Championships
1960 NCAA Swimming and Diving Championships
Robert F. Busbey
1962 NCAA Swimming and Diving Championships
2009 European Diving Championships

The 1961 NCAA Swimming and Diving Championships were contested in March 1961 at the Pavilion Pool at the University of Washington in Seattle, Washington at the 25th annual officially NCAA-sanctioned swim meet to determine the team and individual national champions of men's collegiate swimming and diving in the United States.
 Including the championships held before NCAA sponsorship in 1937, this was the 38th overall American collegiate championship.
The 1959 NCAA Swimming and Diving Championships were contested in March 26−28, 1959 at Teagle Pool at Cornell University in Ithaca, New York at the 23rd annual officially NCAA-sanctioned swim meet to determine the team and individual national champions of men's collegiate swimming and diving in the United States.
 Including the championships held before NCAA sponsorship in 1937, this was the 36th collegiate championship overall.
The 2011 European Diving Championships was the secondedition of the European Diving Championships and took part from 8–13 March 2011 in Turin, Italy.
 For the second time, the event was held separately from the European Swimming Championships.
 The event was held on Monumentale Diving Stadium.
 The former capital of Italy was hosting European Diving Championships for the third time after 1954 and 2009.
 The 2011 Championships were also an event within the frame of the 150-year celebrations of the unification of Italy.
 A total of ten disciplines was on the schedule.
 Additionally, there was a team event on the first day of competition.
The University of North Carolina is a multi-campus public university system composed of all 16 of North Carolina's public universities, as well as the NC School of Science and Mathematics, the nation's first public residential high school for gifted students.
 Commonly referred to as the University of North Carolina system or the UNC system to differentiate it from the original campus in Chapel Hill, the university has a total enrollment of over 183,001 students and confers over 75% of all baccalaureate degrees in North Carolina in 2008.
The 1949 NCAA Swimming and Diving Championships were contested in March 1949 at the Bowman Gray Pool at the University of North Carolina in Chapel Hill, North Carolina at the 13th annual NCAA-sanctioned swim meet to determine the team and individual national champions of men's collegiate swimming and diving in the United States.
The 1926 NCAA Swimming and Diving Championships were contested as part of the third annual NCAA swim meet to determine the team and individual national champions of men's collegiate swimming and diving in the United States.
The 1960 NCAA Swimming and Diving Championships were contested in March 1960 at Perkins Natatorium at Southern Methodist University in University Park, Texas at the 24th annual officially NCAA-sanctioned swim meet to determine the team and individual national champions of men's collegiate swimming and diving in the United States.
 Including the championships held before NCAA sponsorship in 1937, this was the 37th overall American collegiate championship.
Robert "Bob" F. Busbey (April 18, 1928 – March 9, 2000) was an athletic director, vice president, and head swimming coach at Cleveland State University.
 He served as athletic director from 1966 until 1990, head swimming coach for 30 years, and also coached track and golf.
 He was unanimously elected as a charter member of the Cleveland State hall of fame in 1975.
 During his coaching tenure he was named an assistant coach to the 1964 USA Olympic swim team, served as chairman of the NCAA Swimming Committee and was responsible for Cleveland State hosting four Division I and one Division II NCAA Men's Swimming and Diving Championships.
 He was editor of the NCAA rules book over 12 years and received the 1982 National Collegiate & Scholastic Swimming Trophy, one of the sports highest awards.
The 1962 NCAA Swimming and Diving Championships were contested in March 1962 at the Ohio State Natatorium at the Ohio State University in Columbus, Ohio at the 26th annual officially NCAA-sanctioned swim meet to determine the team and individual national champions of men's collegiate swimming and diving in the United States.
 Including the championships held before NCAA sponsorship in 1937, this was the 39th overall American collegiate championship.
The 2009 European Diving Championships was the first edition of the European Diving Championships and took part from 1–5 April 2009 in Turin, Italy.
 For the first time, the event was held separately from the European Swimming Championships.
 The event was held on Monumentale Diving Stadium.
 The former capital of Italy was hosting European Diving Championships for the third time after 1954 and 2009.
 A total of ten disciplines was on the schedule.
 Additionally, there was a team event on the first day of competition.