Frequencies for first 10,000 rows of mbcntry variable in natlterr2007 dataset :

   Mother's |
      Birth |
  Country R |      Freq.     Percent        Cum.
------------+-----------------------------------
         AR |          5        0.05        0.05
         AS |          1        0.01        0.06
         CA |          4        0.04        0.10
         CH |          2        0.02        0.12
         CO |          8        0.08        0.20
         CS |          1        0.01        0.21
         CU |          4        0.04        0.25
         DR |        122        1.22        1.47
         FI |          1        0.01        1.48
         GG |          1        0.01        1.49
         GM |          5        0.05        1.54
         GY |          1        0.01        1.55
         IN |          2        0.02        1.57
         JA |          1        0.01        1.58
         JO |          1        0.01        1.59
         LE |          1        0.01        1.60
         MX |         10        0.10        1.70
         NL |          1        0.01        1.71
         PE |          2        0.02        1.73
         PM |          2        0.02        1.75
         SC |          3        0.03        1.78
         SP |          1        0.01        1.79
         TH |          1        0.01        1.80
         UK |          1        0.01        1.81
         US |      6,529       65.29       67.10
         UY |          1        0.01       67.11
         VE |          3        0.03       67.14
         VI |          2        0.02       67.16
         YY |      3,176       31.76       98.92
         ZZ |        108        1.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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