Frequencies for first 10,000 rows of eprolstr variable in namcs2014 dataset :

     If computerized patient |
     history and demographic |
       info, does it include |
                  patient pr |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                     Unknown |         49        0.49        0.49
                         Yes |      8,047       80.47       80.96
                          No |      1,770       17.70       98.66
Yes, but turned off/not used |        134        1.34      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017