Before them, on easels, colored charts tracked the United States trade imbalance with Mexico and the size of Mexican wages.

Both of these singles were also Number One hits on the RPM Top Country Tracks charts in Canada.

The chart does not track digital download sales, which are instead calculated on the Christian Digital Songs chart.

The mahendo'sat have doublecrossed us so many times you need a chart to track it.

The chart tracks Facebook, Twitter, Tumblr, YouTube, and Instagram usage.

Like Heatseekers Albums, this chart tracks titles from "new or developing acts", similarly determined by the act's historical chart performance.

The chart tracked dollars per pound, rather than pounds per dollar.

Photographs of company facilities include protesters; the charts track the rise of oil consumption and global warming, and there are no actual numbers in the report.

The chart tracks the evolution of a single disease, from a time when there was no vaccine to when the disease is eradicated.

This chart, compiled largely using United States government information, tracks a number of trends in Iraq that can help shed light on how the situation is evolving.