Frequencies for first 10,000 rows of per_typ variable in person dataset :

Person Type |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,340       53.40       53.40
          2 |      3,782       37.82       91.22
          3 |         36        0.36       91.58
          4 |          1        0.01       91.59
          5 |        725        7.25       98.84
          6 |         79        0.79       99.63
          7 |          5        0.05       99.68
          8 |          6        0.06       99.74
          9 |         26        0.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016