Via the Wall Street Journal:
Note: these are absolute numbers, so though the red life shows the number at the peak (in early '08), the number of folks entering the labor market between now and then is not represented. If it were it would be a bit endogenous - in a healthy economy more folks enter the labor force while recessions cause drop outs and delays to entry. Just something to keep in mind.
The US March jobs report is out tomorrow morning.