Figure 1.
The mean (±s.e.) percentage of donations made anonymously according to the relative donation amount. Data from individual or family donations (not from companies or other collectives) only were used. Sample sizes are shown above each bar.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.