Frequencies for first 10,000 rows of mbcntry variable in linkpe2009psden dataset :

   Mother's |
      Birth |
Country R** |      Freq.     Percent        Cum.
------------+-----------------------------------
         AR |          2        0.02        0.02
         BL |          1        0.01        0.03
         CA |          3        0.03        0.06
         CH |          3        0.03        0.09
         CO |         14        0.14        0.23
         CS |          1        0.01        0.24
         CU |          6        0.06        0.30
         DO |          2        0.02        0.32
         DR |        149        1.49        1.81
         EC |          1        0.01        1.82
         GM |          6        0.06        1.88
         GY |          2        0.02        1.90
         HO |          1        0.01        1.91
         IS |          1        0.01        1.92
         IT |          1        0.01        1.93
         JM |          1        0.01        1.94
         JO |          1        0.01        1.95
         KS |          1        0.01        1.96
         KU |          1        0.01        1.97
         MX |         12        0.12        2.09
         NU |          1        0.01        2.10
         PE |          5        0.05        2.15
         PM |          3        0.03        2.18
         SP |          3        0.03        2.21
         ST |          1        0.01        2.22
         SY |          1        0.01        2.23
         TD |          1        0.01        2.24
         US |      8,245       82.45       84.69
         UY |          1        0.01       84.70
         VE |          2        0.02       84.72
         VI |          3        0.03       84.75
         WE |          1        0.01       84.76
         YY |      1,506       15.06       99.82
         ZZ |         18        0.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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