Steam Operating.Days Temperature Working.Holidays 
 10.98             20        35.3                0
 11.13             20        29.7                0
 12.51             23        30.8                0
  8.40             20        58.8                0
  9.27             21        61.4                0
  8.73             22        71.3                0
  6.36             11        74.4                1
  8.50             23        76.7                0
  7.82             21        70.7                0
  9.14             20        57.5                0
  8.24             20        46.4                0
 12.19             21        28.9                0
 11.88             21        28.1                0
  9.57             19        39.1                0
 10.94             23        46.8                0
  9.58             20        48.5                0
 10.09             22        59.3                0
  8.11             22        70.0                0
  6.83             11        70.0                1
  8.88             23        74.5                0
  7.68             20        72.1                0
  8.47             21        58.1                0
  8.86             20        44.6                0
 10.36             20        33.4                0
 11.08             22        28.6                0