Look at the picture and learn the vocabularies used

1. Rose/ increased steadily
2. Rose/ increased dramatically
3. Rose/ increased gradually
4. Plunged to ...
5. Peaked at / reached a high of ...
6. Stood at
7. Fluctuated
8. Fell/ dropped dramatically/ sharply
9. Reach a trough of ...
10. Remained constant/ unchanged/ stable at ...
11. Levelled off/ evened out at ...
12. Hit a low of ...