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

Person Type |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,367       53.67       53.67
          2 |      3,840       38.40       92.07
          3 |         74        0.74       92.81
          4 |          2        0.02       92.83
          5 |        622        6.22       99.05
          6 |         67        0.67       99.72
          7 |          1        0.01       99.73
          8 |         10        0.10       99.83
          9 |         17        0.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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