Frequencies for a_c1_60 variable in hosp_rollup2552_96_2011 dataset :

    a_c1_60 |      Freq.     Percent        Cum.
------------+-----------------------------------
      17528 |          1        3.45        3.45
      21587 |          1        3.45        6.90
      36799 |          1        3.45       10.34
      74462 |          2        6.90       17.24
    1136902 |          1        3.45       20.69
    1180836 |          1        3.45       24.14
          . |         22       75.86      100.00
------------+-----------------------------------
      Total |         29      100.00

by Jean Roth , jroth@nber.org , 21 Apr 2018