Frequencies for b_1_c0_4501 variable in prds_hosp10_yr2012 dataset :

b_1_c0_4501 |      Freq.     Percent        Cum.
------------+-----------------------------------
    1273115 |          1        0.02        0.02
    1964917 |          1        0.02        0.03
    2781266 |          1        0.02        0.05
   2.51e+07 |          1        0.02        0.06
          . |      6,223       99.94      100.00
------------+-----------------------------------
      Total |      6,227      100.00

by Jean Roth , jroth@nber.org , 24 Aug 2018