analytics.usa.gov: “This data provides a window into how people are interacting with the government online. The data comes from a unified Google Analytics account for U.S. federal government agencies known as the Digital Analytics Program. This program helps government agencies understand how people find, access, and use government services online. The program does not track individuals, and anonymizes the IP addresses of visitors.

Not every government website is represented in this data. Currently, the Digital Analytics Program collects web traffic from around 400 executive branch government domains, across about 5,700 total websites, including every cabinet department…”