Frequencies for a_c1_4501 variable in prds_hosp10_yr2012 dataset :

  a_c1_4501 |      Freq.     Percent        Cum.
------------+-----------------------------------
     752843 |          1        0.02        0.02
    1803119 |          1        0.02        0.03
    2368888 |          1        0.02        0.05
   1.51e+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