How to read the charts
Margins of error, sample sizes and small samples.
Margin of error
Survey figures are estimates. The margin of error shows the range the true value is likely to fall in. Differences smaller than the margin of error may not be real.
Sample size
The number of people who answered. Figures from very few people can be hidden or marked as small samples.
Charts and tables
Each chart can also be read as a table. The source and margin of error are shown with every chart.