user: Question: What were the total number of matches played when the deccan chargers had a strike rate of 15.5?
Columns: ['Player', 'Team', 'Matches', 'Overs', 'Wickets', 'Economy Rate', 'Average', 'Strike Rate', 'Best Bowling']
Types: ['text', 'text', 'real', 'real', 'real', 'real', 'real', 'real', 'text']
Sample row: ['R.P. Singh', 'Deccan Chargers', 16.0, 59.4, 23.0, 6.98, 18.13, 15.5, '4/22']
SQL:

assistant: SELECT SUM("Matches") FROM "Table" WHERE "Team" = 'deccan chargers' AND "Strike Rate" > 15.5;