Frequencies for first 10,000 rows of adrg1cl2 variable in nhamcsed2002 dataset :

   adrg1cl2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,992       99.92       99.92
       1373 |          1        0.01       99.93
       1671 |          3        0.03       99.96
       1722 |          1        0.01       99.97
       1728 |          2        0.02       99.99
       1944 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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