However, you can also find good statistics within books or journal, magazine or newspaper articles.
When you find statistics, check the source of the data. In other words, does the book, article or website list where the statistics came from? Do they come from a reputable or well-known source? If not, attempt to find statistics from a more trustworthy source.
Pew Research Center provides data-driven reports and non-partisan public polling for social issues in the United States and (to a more limited extent) internationally:
(click on the image to see the full example report)
In order to see the different categories and world regions Pew has produced reports on, choose "Research Topics" near the top of the screen:
(click on the image to expand)