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 2 · Income tax
What average income tax rate does each income group pay?
The interactive chart needs JavaScript. The numbers are on the chart's page.
In tax year 2023, the 0.1% of tax returns with the highest incomes paid 26.7% of their adjusted gross income in federal income tax, on average. The rate was 25.9% for the rest of the top 1%, 16.8% for the next 9%, 10.6% for the next 15%, 7.7% for the next 25% and 3.7% for the bottom half. The average rate is total income tax divided by total income for each group, which is lower than the top bracket rate (37%) because lower rates apply to the first dollars of income and to long-term capital gains and most dividends. It counts income tax after credits, never below zero, and leaves out payroll taxes for Social Security and Medicare, which weigh more on lower and middle incomes, as well as returns of people claimed as dependents.
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: IRS Statistics of Income, Table 4.1 (individual returns by income percentile) (Public domain (U.S. government work)) · Data as of Dec 31, 2023
Open the chart and its numbersChart 2 of 2 · World
How fast has the world come online?
The interactive chart needs JavaScript. The numbers are on the chart's page.
73.6% of the world's people used the internet in 2025, up from 15.6% in 2005, the first year the World Bank gives a world figure. It counts people who used the internet at least once in the previous three months. The world figures are estimates by the International Telecommunication Union.
How to read this chart
Each point is the share of the world's people who used the internet at least once in the previous three months, as estimated by the International Telecommunication Union. The axis starts at zero, so the height shows the true share. The steeper the line, the faster people were coming online.
Questions to discuss
- About what share of the world was online in the first year on the chart, and in the latest year?
- Did the share grow faster in some years than others? What could have sped it up?
- Using the internet once in three months counts here. What does this number leave out about how people get online?
Source: World Bank, World Development Indicators: Individuals using the Internet (% of population) (CC BY 4.0 (credit the World Bank)) · Data as of Dec 31, 2025
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