Frequencies for first 10,000 rows of peinusyr variable in morg97 dataset :

      (dp) Year of entry to US |      Freq.     Percent        Cum.
-------------------------------+-----------------------------------
              Not Foreign Born |      8,588       85.88       85.88
                   Before 1950 |         70        0.70       86.58
                     1950-1959 |         95        0.95       87.53
                     1960-1964 |         62        0.62       88.15
                     1965-1969 |         90        0.90       89.05
                     1970-1974 |        133        1.33       90.38
                     1975-1979 |        211        2.11       92.49
                     1980-1981 |        129        1.29       93.78
                     1982-1983 |         58        0.58       94.36
                     1984-1985 |         64        0.64       95.00
                     1986-1987 |         74        0.74       95.74
                     1988-1989 |         93        0.93       96.67
                     1990-1991 |        135        1.35       98.02
                     1992-1993 |         65        0.65       98.67
                     1994-1997 |        133        1.33      100.00
-------------------------------+-----------------------------------
                         Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Mar 2017