NLSY: Broken Value Labels

[ericbusboom]

The Value labels in the NLSY objet are broken, requiring this fix:

        self._value_labels.replace({
            '12 FOR SCHOOL EMPLOYEES ONLY': 12,
            '12  FOR SCHOOL EMPLOYEES ONLY': 12,
            '3 SCHOOL EMPLOYEES': 3,
            '3 School employees': 3,
            '3 Transcript requested': 3,
            '4 Transcript requested': 4,
            '5 Transcript requested': 5,
            '6 Transcript requested': 6,
            '7 Transcript requested': 7,
            '7 Transcript not requested': 7,
            '8 Transcript not requested': 8,
            '9 Transcript not requested': 9,
            '10 Transcript not requested': 10,
            '11 Transcript not requested': 11,
            'or Advanced Biology': None,
            '0 FI': 0,
        }, inplace=True)