user: ### NOW ANSWER:
Question: What septembers are 17.1 in December? 
Columns: ['Year', 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December', 'Annual Additions(in millions)', 'Average Monthly Additions(in millions)']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [2002.0, '0.28', '0.35', '0.41', '0.28', '0.29', '0.35', '0.36', '0.49', '0.37', '0.53', '0.72', '0.8', '5.23', '0.44']
SQL:

assistant: SELECT "December" FROM "Table" WHERE "September" = '17.1';