x,y 10,7.7 10,9.87 11,11.18 12,10.43 13,12.36 14,14.15 15,15.73 16,16.4 17,18.86 18,16.13 19,18.21 20,18.37 21,22.61 22,19.83 23,22.67 24,22.7 25,25.16 26,25.55 27,28.21 28,28.12