5   10   15   20   25   30 

       ----+----+----+----+----+----+-
Dez     ¦    ¦xxxxx  xxxxx  ¦    ¦ 
Jan     ¦  xxxxx  xxxxx¦ xxxxx  xxx
Feb xx  xxxxx¦   xxx  xxxxx ¦xxxx¦ 
Mär x  xxxxx ¦xxxxx  xxxxx  ¦    ¦ 
Apr   xxx  xxxxx  xxxxx¦ xxxxx  xx 
Mai  xx ¦xxx ¦  xxxxx  ¦    ¦    ¦x
Jun   xxxxx  xxxxx¦ xxxxx  xxxxx ¦ 
Jul xxxxx  xxxxx  ¦    ¦    ¦    ¦ 
Aug     ¦    ¦    ¦    ¦    ¦xxxxx 
Sep  xxxxx  xxxxx ¦xxxxx  xxxxx  x 
Okt xx x¦ xxxxx   ¦    ¦    ¦  xxxx
Nov    xxxxx ¦xxxxx  xxxxx  xxxxx¦ 
Dez  xxxxx   ¦    ¦    ¦    ¦    ¦