data := [[8, 21.73797186], [-5.104683368, 19.01888825], [9.918660586, 17.28726\
945], [-6.208390770, 20.62515674], [6.981258344, 18.00300919], [8.756593541, 
17.98693669], [-5.299827051, 20.77265883], [-2.722042982, 19.03780853], [.\
1168943e-2, 19.33734423], [2.937795456, 18.23655469], [-4.401827590, 20.607058\
37], [2.003654613, 18.25933987], [7.297284286, 18.46678609], [9.067389333, 17.\
74730195], [6.771814619, 17.75777815], [3.537608014, 18.89784350], [3.72298524\
3, 18.62884602], [5.573677846, 19.09121302], [-5.772784104, 18.88574309], [-6.\
390136890, 20.63865612], [-.5652689496, 18.39361753], [1.563232467, 19.6318454\
1], [4.450069479, 17.78208854], [-5.102091263, 19.75375010], [7.224171156, 18.\
86716868], [-2.973669774, 19.20388618]];