Chữa bài IELTS Task 1

I hope you will give me an exact band and suggest me more new structure, so that I can improve my writing skill effectively. Thank you^^

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The bar chart illustrates the points of team A, B and C over the period of three years starting 2002. Overall, it can be seen from the graph that team B mostly achieved highest outcomes than the other scores of other teams in the given time.
In terms of team A, there was a lowest score in the trio, at 5 point in 2002 and 11 point in 2003. However, these scores of team A rose and became the second highest results in 2004 and 2005, at 35 point and 8 point respectively. As for team B, scores was highest among all teams, at 82 point in 2002, then declining to 60 point in 2003 and 43 point next year before increasing again to 55 point in 2005.
Regarding team C, the points varied during the period shown. It was 10 point in 2002 and grew to 15 point in next year. Score of this team was just a half to team A’s score in 2004 and then it mildly dropped to 5 point, becoming the lowest score.