Looking for statistics and data? There are a number of ways to go about finding them! Besides searching the literature for your topic, you can also try looking in one of our databases of data, statistics, and polls (including ones that allow data visualization like PolicyMap or SimplyAnalytics).
From the University of Washington's guide to data:
Where did this data come from? Who (person or entity) gathered the data?
Who funded the data collection? What are their biases and priorities for this data?
What was the purpose of compiling this dataset? Why did the researcher gather this data?
What research projects has this data been used for?
Look for similar datasets, how does the data compare? Are there differences across datasets that need to be mediated?
Is this data common knowledge?
What is missing from the dataset? Who or what is not represented by the dataset?
Is the dataset appropriate for the purpose of your research?
How does your research align with the goals of other research that has used this data?
Is the dataset relevant to the discipline of your research?
How do you have to manipulate the data to fit your research question? Is there another dataset better suited for your research purpose?