Frequencies for first 10,000 rows of ebillreco variable in nhamcsopd2010 dataset : does your opd submit claims | electronically (electronic | billing)? | Freq. Percent Cum. ---------------------------------+----------------------------------- blank | 10,000 100.00 100.00 ---------------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016