Frequencies for first 10,000 rows of ewhonoter variable in nhamcsed2011 dataset :

At your ED, prescriptions and lab tests |
orders are not submitted electronically |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                  Blank |     10,000      100.00      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016