Frequencies for first 10,000 rows of privins variable in namcs1994 dataset : expected | source of | payment - | private/com | m insur | Freq. Percent Cum. ------------+----------------------------------- 0 | 6,359 63.59 63.59 1 | 3,641 36.41 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016