Frequencies for first 10,000 rows of econdp_12 variable in mort2006 dataset : Part/line | number on | certificate | 12 | Freq. Percent Cum. ------------+----------------------------------- 6 | 2 0.02 0.02 . | 9,998 99.98 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Dec 2015