17.5 18 18.5 19 20 20.5 21 21.5 22 22.5 23 24 25 25.5 26 27 28 28 1/2 28.5 29 29.5 30 30 1/2 30.5 31 31 1/2 32 33 33 1/2 33.5 34 35 35 1/2 35.5 36 36 2/3 36.5 37 37 1/3 37.5 38 38 1/2 38 2/3 38.5 39 39 1/3 39.5 40 40 2/3 40.5 41 41 1/2 41 1/3 41.5 42 42 1/2 42 2/3 42.5 43 43 1/3 43.5 44 44 1/2 44 2/3 44.5 45 45 1/2 45 1/3 45.5 46 46 2/3 46.5 47 47 1/3 47.5 48 48 2/3 48.5 49 1/3 50 50 1/3 50 2/3 51 1/3 52 2/3 53 1/3 54 2/3