Bar charts for time series

Bars should be used to emphasize individual values at distinct points in time. Use them when data points are at equal intervals.

Do

Example of bar chart showing increases and decreases over time

A bar chart showing increases and decreases in data over a period of equal ten-year intervals from 1900 to 2010.

Example of bar chart showing gradual decrease over time

A bar chart showing the gradual decrease in data over a period of equal ten-year intervals from 1900 to 2010.