user: Question: How many births per year are there for the period with 998 000 deaths per year?
Columns: ['Period', 'Live births per year', 'Deaths per year', 'Natural change per year', 'CBR*', 'CDR*', 'NC*', 'TFR*', 'IMR*', 'Life expectancy total', 'Life expectancy males', 'Life expectancy females']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'real', 'text', 'text', 'text']
Sample row: ['1950-1955', '2 572 000', '900 000', '1 672 000', '44.1', '15.5', '28.6', '6.15', 135.0, '50.9', '49.2', '52.6']
SQL:

assistant: SELECT "Live births per year" FROM "Table" WHERE "Deaths per year" = '998 000';