National governments often mandate the keeping of statistics and task key agencies with this duty. The data collected often change over the years, statistics may not always be published, and raw data and data sets are not always accessible. Additionally, data may be only available in print format only.
The best strategy for finding statistics is to do a thorough search of the agencies' publications both print and online. For print, search CLIO by publisher or, alternately, do a "Subject Heading" search:
North and Central America