This data is analyzed/discussed in Preisser JS, Galecki AT, Lohman KK and 
Wagenknecht LE (2000). "Analysis of Smoking Trends With Incomplete Longitudinal
Binary Responses", Journal of the American Statistical Association, 95:1021-31.
These authors analyze the first four timepoints.

Key to variables:

id = person identifier code
age = baseline (yr_fu=0) age in years
birth      1 = 1963-1967
           2 = 1959-1962 
           3 = 1955-1958
education: 1 = High School or less
	   2 = Some College 
	   3 = College Degree
yr_fu = the year of followup measurement with 
		year 0 referencing 1986.
		year 2 referencing 1988.
		year 5 referencing 1991.
		year 7 referencing 1993.
		year 10 referencing 1996.
smoke = reported smoker (1=yes, 0=no)
racesex:   1 = Black Males
           2 = Black Females
           3 = White Males
           4 = White Females

DATA:
----------------------------------------------------
id       age   birth education   yr_fu    smoke   racesex