Longest spans at courses between hosting US Opens

Longest spans at courses between hosting U.S. Opens:

?Course ?Yrs.....Span.

?Shinnecock Hills ?.90.1896-1986

?Olympia Fields ?.75.1928-2003

?The Country Club ?.50...1913-63

?Congressional ?.33...1964-97

?Merion ?.32.1981-2013