The USA Social Security Administration official website has a really powerful tool that will show you the popularity of any name you enter. It shows the ranking of the name for 14 years. Rank 1 is the most popular, rank 2 is the next most popular, and so forth. Baby name data are from Social Security card applications for births that occurred in the United States.
When I entered my name "Daniel", this was the result:
This is the result when I entered "Jacob":
Jacob has been the top boy baby name in the United States for the past 14 years, amazing!
Try the tool for yourself: http://www.ssa.gov/cgi-bin/babyname.cgi