20 ppm(2) 21 ppm(3) 24 ppm(1) 25 ppm(1) 26 ppm(3) 27 ppm(1) 33 ppm(2) 35 ppm(6) 40 ppm(11) 42 ppm(1) 43 ppm(1) 45 ppm(2) 47 ppm(2) 52 ppm(2) 53 ppm(1)