Frequencies for first 10,000 rows of srty_bond_cd variable in pos2010 dataset :

SURETY BOND |
  INDICATOR |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,847       98.47       98.47
          N |        142        1.42       99.89
          W |          7        0.07       99.96
          Y |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017