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.
Chart 1 of 3 · Inflation
How fast is car insurance getting more expensive?
The interactive chart needs JavaScript. The numbers are on the chart's page.
Car insurance prices changed by -5% in the 12 months to September 2026 (a minus sign means they fell). Their fastest rise since 1976 came in April 2024, when prices were 22.6% higher than in April 2023. Each point compares a month with the same month a year earlier. BLS priced car insurance only every few months before 1970, so the chart starts in 1971. BLS collected no prices in October 2025 and published none for car insurance in November 2025, so those months and the same months of 2026 are missing.
Questions to discuss
- In one sentence of your own, what does this chart show?
- Find the biggest change or difference in the chart. What might explain it?
- Who collected these numbers, and how recent are they? What else would you want to know before drawing a conclusion?
Source: U.S. Bureau of Labor Statistics, Consumer Price Index (motor vehicle insurance) (Public domain (U.S. government work)) · Data as of Sep 30, 2026
Open the chart and its numbersChart 2 of 3 · World
How has the world's population grown since 1960?
The interactive chart needs JavaScript. The numbers are on the chart's page.
The world had 8.22 billion people in 2025, about 2.7 times the 3.02 billion of 1960. It passed 8 billion in 2023. Figures are mid-year estimates from the United Nations, which revises them as new censuses come in.
How to read this chart
Each point is the number of people alive in the world in the middle of that year, estimated by the United Nations. The axis starts at zero, so the height of the line shows the true size. Look at how steep the line is to see how fast the population grew.
Questions to discuss
- Judging from the chart, about how many years did it take the world to add its most recent billion people?
- Is the line getting steeper or flatter in recent years? What does that tell you about the growth rate?
- These numbers are estimates that the UN revises. Why is it hard to count every person on Earth?
Source: World Bank, World Development Indicators: Population, total (CC BY 4.0 (credit the World Bank)) · Data as of Dec 31, 2025
Open the chart and its numbersChart 3 of 3 · World
How much does each country spend on health care per person?
The interactive chart needs JavaScript. The numbers are on the chart's page.
In 2023, the United States spent $13,473 per person on health care, about 10 times the world figure of $1,317. Germany spent $6,395, Japan $3,638, China $763 and India $85; Madagascar spent the least, $17. Search 191 countries and territories. Spending counts what governments, insurers and households paid for health care, but not new hospitals or equipment, in US dollars at each year's exchange rates, not adjusted for differences in prices.
How to read this chart
Each bar is what a country spent on health care in a year, by governments, insurers and households together, divided by its population and turned into U.S. dollars. The dashed line is the world. The figures aren't adjusted for prices, so a dollar buys more care in some countries than others.
Questions to discuss
- About how many times the world figure does the United States spend per person?
- Does spending more on health care per person always mean people live longer? What other chart on Chartly could help you check?
- Doctors and nurses are paid less in some countries. How would that change what these dollar figures can tell you?
Source: World Bank, World Development Indicators: Current health expenditure per capita (current US$) (CC BY 4.0 (credit the World Bank)) · Data as of Dec 31, 2023
Open the chart and its numbersTeachers: make your own chart assignment, or change this one. Free, no account needed.