{"Polluted":21.3,"Unpolluted":14.2}
{"Polluted":18.7,"Unpolluted":18.3}
{"Polluted":23,"Unpolluted":17.2}
{"Polluted":17.1,"Unpolluted":18.4}
{"Polluted":16.8,"Unpolluted":20}
{"Polluted":20.9}
{"Polluted":19.7}