Number of station in climate zones:
   1       0    0.
   2       0    0.
   3       0    0.
   4       0    0.
   5      87    2.
   6      39    1.
   7       0    0.
   8      56    1.
   9     118    3.
  10       0    0.
  11     165    4.
  12    1308   32.
  13      47    1.
  14       9    0.
  15       0    0.
  16       0    0.
  17     321    8.
  18      64    2.
  19       0    0.
  20      49    1.
  21     629   16.
  22     583   14.
  23       0    0.
  24       0    0.
  25       0    0.
  26       0    0.
  27       0    0.
  28       5    0.
  29       5    0.
  30       0    0.
  31       0    0.
  32      59    1.
  33       0    0.
  34       0    0.
  35     362    9.