Frequencies for per_no variable in nmprior dataset :

     person |
     number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,981       90.48       90.48
          2 |        403        6.10       96.58
          3 |         99        1.50       98.08
          4 |         36        0.54       98.62
          5 |         19        0.29       98.91
          6 |         12        0.18       99.09
          7 |         12        0.18       99.27
          8 |          7        0.11       99.38
          9 |          7        0.11       99.49
         10 |          7        0.11       99.59
         11 |          5        0.08       99.67
         12 |          4        0.06       99.73
         13 |          4        0.06       99.79
         14 |          3        0.05       99.83
         15 |          3        0.05       99.88
         16 |          2        0.03       99.91
         17 |          2        0.03       99.94
         18 |          1        0.02       99.95
         19 |          1        0.02       99.97
         20 |          1        0.02       99.98
         21 |          1        0.02      100.00
------------+-----------------------------------
      Total |      6,610      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016