In the first year, the country exports 53 tons.
In the second year, it exports 53 + 5 = <<53+5=58>>58 tons.
In the third year, it exports 58 + 5 = <<58+5=63>>63 tons.
In the fourth year, it exports 63 + 5 = <<63+5=68>>68 tons.
In the fifth year, it exports
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