5   10   15   20   25   30 

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