Frequencies for first 10,000 rows of llbyr variable in natl1992 dataset : Year of | Last Live | Birth | Freq. Percent Cum. ------------+----------------------------------- 1970 | 1 0.01 0.01 1971 | 2 0.02 0.03 1972 | 6 0.06 0.09 1973 | 9 0.09 0.18 1974 | 14 0.14 0.32 1975 | 19 0.19 0.51 1976 | 21 0.21 0.72 1977 | 24 0.24 0.96 1978 | 32 0.32 1.28 1979 | 48 0.48 1.76 1980 | 63 0.63 2.39 1981 | 88 0.88 3.27 1982 | 111 1.11 4.38 1983 | 160 1.60 5.98 1984 | 184 1.84 7.82 1985 | 263 2.63 10.45 1986 | 343 3.43 13.88 1987 | 492 4.92 18.80 1988 | 811 8.11 26.91 1989 | 1,200 12.00 38.91 1990 | 1,487 14.87 53.78 1991 | 228 2.28 56.06 1992 | 121 1.21 57.27 7777 | 4,268 42.68 99.95 9999 | 5 0.05 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Dec 2015