Frequencies for first 10,000 rows of registry variable in uswbo19agesadj dataset :

                      Registry |      Freq.     Percent        Cum.
-------------------------------+-----------------------------------
                Alaska Natives |        113        1.13        1.13
               Arizona Indians |      1,498       14.98       16.11
    Registry for non-SEER area |      8,389       83.89      100.00
-------------------------------+-----------------------------------
                         Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 2 Jan 2018