Frequencies for first 10,000 rows of seetlkpv variable in h42f2 dataset :

DID P VISIT |
    PROV IN |
  PERSON OR |
  TELEPHONE |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |          1        0.01        0.01
         -8 |          1        0.01        0.02
          1 |      9,978       99.78       99.80
          2 |         20        0.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Feb 2018