Yes, I do understand what are properly called secular trends in the work force and, more critically, their statistical foundations. However, you would do well to lecture the DemoKerrys as to their fetish for claiming 'record job losses under Bush' in that they refer to absolute numbers rather than rates. Yet you seem to endorse their wingeing him by one standard and absolving themselves by another -- more liberal, of course -- standard.
You do understand about comparing 'apples to apples', right?