Frequencies for first 10,000 rows of mbcntry variable in natlterr2011 dataset :

   Mother's |
      Birth |
  Country R |      Freq.     Percent        Cum.
------------+-----------------------------------
         BG |          1        0.01        0.01
         BL |          2        0.02        0.03
         BR |          2        0.02        0.05
         CA |          2        0.02        0.07
         CH |        216        2.16        2.23
         CI |          1        0.01        2.24
         CO |          7        0.07        2.31
         CS |          1        0.01        2.32
         CU |          8        0.08        2.40
         DR |         99        0.99        3.39
         EC |          1        0.01        3.40
         ES |          1        0.01        3.41
         EZ |          1        0.01        3.42
         FJ |          1        0.01        3.43
         FM |        501        5.01        8.44
         FP |          1        0.01        8.45
         GM |         12        0.12        8.57
         GY |          1        0.01        8.58
         HK |          4        0.04        8.62
         HU |          1        0.01        8.63
         ID |          1        0.01        8.64
         IN |          2        0.02        8.66
         JA |         35        0.35        9.01
         JO |          1        0.01        9.02
         KR |          1        0.01        9.03
         KS |         83        0.83        9.86
         LO |          1        0.01        9.87
         LY |          1        0.01        9.88
         MP |          3        0.03        9.91
         MT |          1        0.01        9.92
         MX |         11        0.11       10.03
         MY |          1        0.01       10.04
         NP |          9        0.09       10.13
         PE |          3        0.03       10.16
         PK |          1        0.01       10.17
         PM |          3        0.03       10.20
         PO |          1        0.01       10.21
         PS |         25        0.25       10.46
         RM |          6        0.06       10.52
         RO |          1        0.01       10.53
         RP |        472        4.72       15.25
         RS |          7        0.07       15.32
         SF |          1        0.01       15.33
         SP |          3        0.03       15.36
         SY |          1        0.01       15.37
         TD |          1        0.01       15.38
         TH |          3        0.03       15.41
         TW |          4        0.04       15.45
         TZ |          1        0.01       15.46
         UK |          1        0.01       15.47
         US |      7,258       72.58       88.05
         VE |          9        0.09       88.14
         VI |          1        0.01       88.15
         VM |          2        0.02       88.17
         YY |      1,107       11.07       99.24
         ZZ |         76        0.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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