May │ 29.80│11.66│ 15.46│10.70│ 20.78│ 15.83│ 22.38│ 126.64 June │ 28.35│12.51│ 15.13│10.59│ 20.74│ 16.13│ 22.50│ 125.99 July │ 26.46│12.13│ 15.56│10.72│ 20.90│ 16.60│ 22.56│ 124.95 August │ 25.99│11.38│ 16.03│10.97│ 21.40│ 16.61│ 22.67│ 125.07 September│ 24.97│11.44│ 16.25│10.85│ 21.46│ 16.95│ 22.74│ 124.68 October │ 23.54│11.46│ 18.76│10.71│ 21.92│ 17.06│ 23.17│ 126.66 November │ 24.02│11.39│ 20.61│10.95│ 22.32│ 17.27│ 23.87│ 130.46 December │ 25.16│10.55│ 20.97│11.22│ 22.80│ 18.32│ 24.10│ 133.14 │ │ │ │ │ │ │ │ 1916— January │ 27.31│11.49│ 20.50│11.21│ 23.42│ 18.89│ 24.82│ 137.66 February │ 28.78│12.23│ 20.40│11.40│ 23.60│ 19.81│ 26.02│ 142.26 March │ 26.27│13.22│ 20.81│11.52│ 23.78│ 20.38│ 26.10│ 142.11 April │ 26.70│14.16│ 21.25│11.93│ 24.94│ 20.64│ 26.04│ 145.69 May │ 26.77│14.61│ 20.63│12.07│ 25.13│ 20.88│ 26.08│ 146.19 June │ 25.63│15.04│ 19.26│12.23│ 25.39│ 21.65│ 26.17│ 145.39 July │ 26.37│14.40│ 19.43│12.15│ 25.80│ 21.17│ 25.79│ 145.14 August │ 28.66│13.65│ 17.36│12.01│ 25.89│ 21.05│ 25.27│ 143.93 September│ 31.06│14.69│ 21.54│11.96│ 26.51│ 21.22│ 25.02│ 152.01 October │ 31.82│13.69│ 20.70│12.61│ 26.82│ 21.32│ 25.37│ 152.35 November │ 36.77│14.23│ 24.27│13.02│ 29.09│ 21.79│ 25.63│ 164.84 December │ 36.09│14.24│ 25.40│12.92│ 30.23│ 23.39│ 25.80│ 168.09 │ │ │ │ │ │ │ │ 1917— January │ 36.15│15.02│ 25.16│12.92│ 30.08│ 24.45│ 25.76│ 169.56 February │ 37.86│16.12│ 27.37│12.98│ 30.38│ 25.02│ 26.51│ 176.27 March │ 40.95│17.03│ 31.50│13.16│ 30.38│ 25.97│ 27.21│ 186.24 April │ 43.81│18.89│ 29.30│13.28│ 30.67│ 26.68│ 27.35│ 190.01 May │ 55.36│19.38│ 30.72│13.71│ 32.08│ 28.44│ 28.72│ 208.43 June │ 53.50│19.81│ 33.60│13.86│ 33.02│ 29.88│ 28.88│ 212.58 July │ 53.91│18.82│ 26.44│14.22│ 36.52│ 32.39│ 29.61│ 211.95 August │ 64.07│17.74│ 21.24│15.21│ 36.91│ 32.57│ 31.01│ 218.77 September│ 54.68│19.35│ 22.75│15.55│ 38.61│ 32.65│ 31.39│ 215.01 October │ 55.51│19.12│ 25.80│16.08│ 39.43│ 31.15│ 32.55│ 219.67 November │ 55.68│18.16│ 25.88│18.72│ 40.44│ 29.84│ 32.00│ 220.75 December │ 53.99│19.00│ 27.02│18.76│ 40.74│ 28.41│ 32.22│ 220.17 │ │ │ │ │ │ │ │