The bar chart
belowsshows about average annual Gross Domestic Products (GDP) growth in a four edge between 1960s-1990s
The bar chart compares the annual GDP growth in three types of countries: wealthy countries, globalisers and non-globalisers in four consecutive decades, starting from 1960s.
In the beginning, let us see the chart movements of wealthy countries
I think this sentence is not necessary.
let us see
This is more suitable in speaking than writing a report.
the number of GDP growth about 4,8 percent, and it is become the highest portion in over a 4 years edge
This sentence has several grammatical mistakes.
In 1960s, wealthy countries had the highest GDP growth of the three sorts of countries mentioned, at about 4.8 percent.
The number was gradually falling in the twenty years forward.
After that, the figure declined steadily until finishing the period at 2.0%
Let us turn into Globalisers GDP growth whom condition contrary different.
Meanwhile, globalised countries experienced an opposite trend.
The GDP number
awake about 1,2 percent in 1960s and rising to 2,9 in 1970s period
started out at 1.2 percent in 1960s and subsequently rose every decade to reach a peak of approximately 5.0 percent in 1990s.
The last group of countries which called Non-globalisers become the last discussion.
Non-globalisers' growth rate saw a fluctuation during the same period.
In this task, you don't need to list every single detail of the chart. Instead, you should pick the most remarkable of the chart and then compare and contrast them in your essay. Also, you should pay more attention to your grammar and essay structure (as Dumi suggested in the previous comment).
Hope this helps!