Limit by domain name to see results only from .org sites or .gov sites. Example: Iowa arts site:.gov
Add the word statistics to your search terms if that's what you need.
Add + before a word to force Google to include it (note there is not a space after +). Example: arts +statistics
Limit to government sites for statistics. Example: arts economic impact site:.gov
Use quotation marks to search for logical phrases. Example: arts "economic impact"