The evolution of pole vault since 1975:
18 feet 6 1/2 inches–Dave Roberts, U.S., at Gainesville, Fla., March 25, 1975.
18-7 1/4–Earl Bell, U.S., at Wichita, May 29, 1976.
18-8 1/4–Roberts, at Eugene, Ore., June 22, 1976.
18-9 1/4–Wladyslaw Kosakiewicz, Poland, Milan, Italy, May 11, 1980.
18-10 1/4–Thierry Vigneron, France, Lille, France, June 29, 1980.
18-11–Philippe Houvion, France, Paris, July 17, 1980.
18-11 1/2–Kosakiewicz, Moscow, July 30, 1980.
19-0 1/4–Vigneron, Macon, Ga., June 20, 1981.
19-0 3/4–Vladimir Polyakov, Soviet Union, Tbilisi, U.S.S.R., June 26, 1981.
19-1–Pierre Quinon, France, Cologne, France, Aug. 28, 1983.
19-1 1/2–Vigneron, Rome, Sept. 9, 1983.
19-2 1/4–Sergei Bubka, Soviet Union, Bratislava, Czechoslovakia, May 26, 1984.
19-3 1/2–Bubka, Paris, June 2, 1984.
19-4 1/4–Bubka, London, July 13, 1984.
19-4 3/4–Vigneron, Rome, Aug. 31, 1984.
19-5 3/4–Bubka, Rome, Aug. 31, 1984.
19-8 1/4–Bubka, Paris, July 13, 1985.
