Frequencies for statecontractexist variable in snp2010 dataset :

      State |
   Contract |
      Exist |      Freq.     Percent        Cum.
------------+-----------------------------------
        N/A |      4,140       47.47       47.47
         No |      2,701       30.97       78.43
        Yes |      1,881       21.57      100.00
------------+-----------------------------------
      Total |      8,722      100.00

by Jean Roth , jroth@nber.org , 14 Apr 2016