CREATE TABLE table_name_99 (numeric_decline_from_peak_population VARCHAR, percent_decline_from_peak_population VARCHAR)

what is the numeric decline from peak population when the perfect decline from peak population is -16.76%
SELECT numeric_decline_from_peak_population FROM table_name_99 WHERE percent_decline_from_peak_population = "-16.76%"
SELECT "numeric_decline_from_peak_population" FROM "table_name_99" WHERE "-16.76%" = "percent_decline_from_peak_population"