user: ### NOW ANSWER:
Question: How many world rankings are after aug 5, 1980 ?
Columns: ['Year', 'Performance', 'World Ranking', 'Venue', 'Date']
Types: ['real', 'text', 'real', 'text', 'text']
Sample row: [1979.0, '8.22.72', 3.0, 'Turin', 'Jun 9']
SQL:

assistant: SELECT SUM("World Ranking") FROM "Table" WHERE "Date" = 'aug 5' AND "Year" > 1980.0;