\Header{presidents}{Approval Rating of US Presidents}
\keyword{datasets}{presidents}
\begin{Usage}
\begin{verbatim}data(presidents)\end{verbatim}
\end{Usage}
\begin{Format}
A time series of 120 values.\end{Format}
\begin{Description}
The (approximately) quarterly approval rating for the President
of the United states from the first quarter of 1945 to the last
quarter of 1974.

The data are actually a fudged version of this.  See McNeil's
book for details.\end{Description}
\begin{Source}
The Gallup Organisation.\end{Source}
\begin{References}
McNeil, D. (1977).  Interactive Data Analysis.  New York: Wiley.\end{References}

