6/12/2001 = Start date of this file by Jean Roth at jroth@nber.org 

Weight in 1975 at Word 21, Character 1=Column 127 is final weight.
1980 is the first year BLS published the earner study weights.

2002-07-29 -- Added variable column location to documentation. jroth@nber.org
1/9/2002 Updated links to (now) freely-available 1969-1975 ICPSR documentation.

1975 ethnicity
1 Mexican American
2 Chicano
3 Mexican (Mexicano)
4 Puerto Rican
5 Cuban
6 Central or South American
7 Other Spanish 
8 Other
9 Don't Know
A NA