user: Question: What is the average total of the census after 1971 with 10,412 (32.88%) Serbs?
Columns: ['Year of census', 'total', 'Croats', 'Serbs', 'Others']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [2001.0, 31670.0, '18,199 (57.46%)', '10,412 (32.88%)', '3,059 (9.66%)']
SQL:

assistant: SELECT AVG("total") FROM "Table" WHERE "Year of census" > 1971.0 AND "Serbs" = '10,412 (32.88%)';