2. e.g. There was a dramatic fluctuation in the share price in 2007.There has been quite a dramatic increase in the number of immigrants entering the UK since 2004.
3. Date + see (+ quite) + a / an (+ adjective) + noun + preposition
4. e.g. January saw a steady growth in our sales in the Czech Republic.
5.
6. So far this month, oil prices have shrunk significantly.