490.0  8 2.8
490.5 15 3.9
491.0  8 2.8
491.5 17 4.1
492.0 14 3.7
492.5 15 3.9
493.0  4 2.0
493.5  6 2.4
494.0  9 3.0
494.5 15 3.9
495.0 24 4.9
495.5 18 4.2
496.0 16 4.0
496.5 51 7.1
497.0 96 9.8
497.5 138 11.7
498.0 76 8.7
498.5 50 7.1
499.0 56 7.5
499.5 20 4.5