Frequencies for first 10,000 rows of ucr281 variable in mort1975 dataset :

     ucr281 |      Freq.     Percent        Cum.
------------+-----------------------------------
        300 |          3        0.03        0.03
        400 |         67        0.67        0.70
        500 |         64        0.64        1.34
        600 |         15        0.15        1.49
        700 |      2,015       20.15       21.64
        900 |      2,578       25.78       47.42
       1000 |         82        0.82       48.24
       1100 |         22        0.22       48.46
       1200 |         36        0.36       48.82
       1300 |        156        1.56       50.38
       1400 |        462        4.62       55.00
       1500 |          3        0.03       55.03
       1800 |          2        0.02       55.05
       1900 |          5        0.05       55.10
       2000 |          8        0.08       55.18
       2100 |         15        0.15       55.33
       2200 |         11        0.11       55.44
       2300 |        308        3.08       58.52
       2400 |         46        0.46       58.98
       2500 |      3,998       39.98       98.96
       2600 |        104        1.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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