+-----------------------------x | |
|------------------------ Jan | |
|---------------- Feb | |
|-------------------- Mar | |
|--------------------- Apr | |
|---------------- May | |
|--------------------- Jun | |
|-------------------------- Jul | |
|------------------- Aug | |
|--------------------- Sep | |
|------------------------- Oct | |
|---------------------------- Nov | |
|------+-----+-----+------+-- Dec | |
| | | | | | |
| 50 100 150 200 | |
y |