Frequencies for s5_c1_7 variable in hcris2552_10_2012 dataset :

    station |
    s500000 |
00700 00100 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          2        0.03        0.03
          2 |         76        1.22        1.25
          3 |        127        2.04        3.29
          4 |         28        0.45        3.74
          5 |          1        0.02        3.76
          6 |          2        0.03        3.79
          8 |          1        0.02        3.81
          9 |          1        0.02        3.82
         10 |          2        0.03        3.85
         12 |          2        0.03        3.89
         18 |          2        0.03        3.92
         21 |          1        0.02        3.93
         60 |          1        0.02        3.95
         80 |          1        0.02        3.97
         84 |          1        0.02        3.98
         90 |          1        0.02        4.00
        120 |          1        0.02        4.01
        156 |          1        0.02        4.03
        296 |          1        0.02        4.05
          . |      5,975       95.95      100.00
------------+-----------------------------------
      Total |      6,227      100.00

by Jean Roth , jroth@nber.org , 23 Aug 2018