#t/s count/30^-1 s^-1 corrected count/ 30^-1 s^-1 15 171 166 45 141 136 75 113 108 105 91 86 135 80 75 165 52 47 195 40 35 225 33 28 255 38 33 285 33 28 315 24 19 345 21 16 375 22 17 405 20 15 435 20 15 465 21 16 495 13 8