original: since independence , botswana has had one of the fastest growth rates in per capita income in the world .
simplifications: since independence , botswana has had one of the fastest growth rates in per capita income in the world . since independence , botswana has had one of the fastest growth rates in per capita income in the world . since independence botswana has had one of the fastest growth rates in per capita income in the world . since independence , botswana has had one of the fastest growth rates in per capita income in the world . since independence , botswana has had one of the fastest-growing per capita incomes in the world . since they became independent , botswana has had one of the fastest growth rates in per capita income in the world . botswana has been growing quickly since its independence . since independence , botswana has had one of the fastest growth rates for its income in the world .