Chart assignment

Charts to read and discuss

Read each chart, then answer its questions. Every chart shows its source and date; open it for a table of the numbers and the data to download.

  1. How has the US death rate from flu and pneumonia changed since 1900?
  2. Are U.S. roads getting safer per mile driven?

Chart 1 of 2 · Health

How has the US death rate from flu and pneumonia changed since 1900?

The interactive chart needs JavaScript. The numbers are on the chart's page.

Influenza and pneumonia killed 297.5 people per 100,000 in 1900 and 612.4 in 1918, the year of the influenza pandemic. By 2018 the rate was 14.9, about 95% lower than in 1900. Rates are age-adjusted, and cause-of-death coding has been revised several times since 1900, so small jumps can reflect those changes. This CDC dataset stops at 2018.

Questions to discuss

  1. In one sentence of your own, what does this chart show?
  2. Find the biggest change or difference in the chart. What might explain it?
  3. Who collected these numbers, and how recent are they? What else would you want to know before drawing a conclusion?

Source: CDC National Center for Health Statistics, Age-adjusted death rates for selected major causes of death (Public domain (U.S. government work)) · Data as of Dec 31, 2018

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Chart 2 of 2 · Road safety

Are U.S. roads getting safer per mile driven?

The interactive chart needs JavaScript. The numbers are on the chart's page.

In 2024 there were 1.19 deaths for every 100 million miles driven, down from 3.35 in 1980. The lowest rate was 1.08 in 2014; it jumped to 1.34 in 2020, when people drove less but deaths rose. Miles driven are the Federal Highway Administration's estimates.

How to read this chart

Each point is the number of people killed in traffic crashes for every 100 million miles Americans drove that year. Dividing by miles driven turns a count into a rate, so years when people drove more or less can be compared fairly.

Questions to discuss

  1. About what fraction of the 1980 rate is the rate in the latest year?
  2. In 2020 people drove less, but the rate went up. What could explain that?
  3. Why is deaths per mile a fairer way to compare years than the total number of deaths?

Source: NHTSA Fatality Analysis Reporting System (FARS) and FHWA Highway Statistics (table VM-2) (Public domain (U.S. government work)) · Data as of Dec 31, 2024

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