user: Question: Name the data with a percent gain of 28.4%
Columns: ['Data', 'Total gain', 'Percent gain', '2003', '2000', '1997', '1994', '1991', '1988', '1985', '1982', '1979', '1976', '1973', '1970', '1967']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['20th percentile', '$3,982', '28.4%', '$17,984', '$19,142', '$17,601', '$16,484', '$16,580', '$17,006', '$16,306', '$15,548', '$16,457', '$15,615', '$15,844', '$15,126', '$14,002']
SQL:

assistant: SELECT "Data" FROM "Table" WHERE "Percent gain" = '28.4%';