Frequencies for first 10,000 rows of cmsa variable in natl2004 dataset :

Consolidate |
          d |
Metropolita |
          n |
Statistical |
   Area U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,997       99.97       99.97
         34 |          1        0.01       99.98
         35 |          1        0.01       99.99
         49 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 21 Jan 2016