IELTS Writing Task 1

Can you check my task 1 and give a band score?

The bar graph exhibits the entire amount of time, defining in a billions of minutes in United Kingdom, separated into 3 groups: local calls, national and international calls, and mobile calls, throghout the period from 1995 to 2002.
Overall, the highest point in our bar graph is the local calls, which reached a peak of 90 billions of minutes in 1999. On the contrary the lowest point determinated by mobile calls just above 5 billions of minutes in 1995. Trends of mobile, international and national calls were upward over the period, however trend of local calls was downward. Here are the key features to notice.
In 1995, local calls was the most frequently used in the UK with approximately 73 bilions of minutes. Afterwards, it increased steadily and reached a peak in 1999. Neverthless, it started to decline from 1999 till 2002.
In sharp contrast to this, national and international calls' trend began at about 36 billions of minutes and went up gradually to 60 billions of minutes in 2002.
Moreover, in this bar grapgh there is unique trend. It is a mobile calls trend, which setted off at 3 billions of minutes then rose slightly untill 1999, thereafter it increased sharply to 45 billions of minutes in 2002. This trend is unique, because in other trends there was no sudden increasing and decreasing trends. (225 words)