Frequencies for first 10,000 rows of tbo_rec variable in natl2011 dataset :

Total Birth |
      Order |
 Recode U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,088       30.88       30.88
          2 |      2,604       26.04       56.92
          3 |      1,709       17.09       74.01
          4 |      1,010       10.10       84.11
          5 |        581        5.81       89.92
          6 |        356        3.56       93.48
          7 |        200        2.00       95.48
          8 |        272        2.72       98.20
          9 |        180        1.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015