Frequencies for first 10,000 rows of dmar variable in natlterr1997 dataset : Marital | Status of | Mother | Freq. Percent Cum. ------------+----------------------------------- 1 | 5,414 54.14 54.14 2 | 3,310 33.10 87.24 3 | 1,276 12.76 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Dec 2015