+---------+-------------------+
| USPop   | R Documentation   |
+---------+-------------------+

Population of the United States
-------------------------------

Description
~~~~~~~~~~~

The ``USPop`` data frame has 22 rows and 1 columns. This is a decennial
time-series, from 1790 to 2000.

Usage
~~~~~

::

    USPop

Format
~~~~~~

This data frame contains the following columns:

year
    census year.

population
    Population in millions.

Source
~~~~~~

U.S.~Census Bureau:
`http://www.census-charts.com/Population/pop-us-1790-2000.html <http://www.census-charts.com/Population/pop-us-1790-2000.html>`_,
downloaded 1 May 2008.

References
~~~~~~~~~~

Fox, J. (2008) *Applied Regression Analysis and Generalized Linear
Models*, Second Edition. Sage.
