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

Special Use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,157       91.57       91.57
          1 |          3        0.03       91.60
          4 |          2        0.02       91.62
          5 |         12        0.12       91.74
          9 |         45        0.45       92.19
          . |        781        7.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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