user: ### NOW ANSWER:
Question: In what Year of Census or Estimate is the Toronto Population larger than 1556396?
Columns: ['Rank', 'City', 'Population', 'Year of Census or Estimate', 'Country']
Types: ['real', 'text', 'real', 'real', 'text']
Sample row: [1.0, 'Mexico City', 8851080.0, 2010.0, 'Mexico']
SQL:

assistant: SELECT SUM("Year of Census or Estimate") FROM "Table" WHERE "Population" > 1556396.0 AND "City" = 'Toronto';