http://www.nber.org/cps/ www.nber.org/cps Current Population Survey http://www.nber.org/cps/ survey redesign in 1994 www.nber.org/cps Historical data Historical data http://www.nber.org/cps/ Current Population Survey www.nber.org/cps/ www.nber.org/cps/ http://www.nber.org/cps/