Hey Boomer,
Below is from the Social Security website FAQs:
Q. Are my benefits figured on my last five years of earnings?
A. No. Retirement benefit calculations are based on your average earnings during a lifetime of work under the Social Security system. For most current and future retirees, we will average your 35 highest years of earnings. Years in which you have low earnings or no earnings may be counted to bring the total years of earnings up to 35.
http://www.ssa.gov/planners/faqs.htm
Also, the Leesburg office of the Social Security Administration can be reached at:
Local Number (352) 787-2624