@subsubheading Description

Monthly mean relative sunspot numbers from 1749 to 1983. Collected at Swiss
Federal Observatory, Zurich until 1960, then Tokyo Astronomical Observatory.

@subsubheading Format

@table @code
@item month
Month of the observation.
@item sunspots
Number of observed sunspots.
@end table

@subsubheading Source

Andrews, D. F. and Herzberg, A. M. (1985) @cite{Data: A Collection
of Problems from Many Fields for the Student and Research Worker}.
New York: Springer-Verlag.

@subsubheading Examples

@example
@INCLUDE_DATASET_EXAMPLE_SCRIPT{sunspots_1.m}
@end example
