For a couple of years, I've been blaming it on iron poor blood, lack of vitamins, dieting and other maladies.  But now I have found the key---I'm tired because I'm overworked.  Here is how I figured it out:

The population of the U.S. is 237 million:
    104 million are retired; that leaves 133 million to dothe work,
    85 million are in school, leaving 48 million to do the work,
    29 million work for the federal government, leaving 19million to do the work,
    4 million are in the armed forces, leaving 15 million to do the work,
    14.8 million work in state and city government, leaving 200,000 to do the work,
    188,000 are in hospitals, leaving 12,000 to do the work,
    11,998 people are in prisons.

That leaves just 2 people to do the work.  You and me, and you're sitting there messing around on the internet!
 

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