I was trying to figure that out too. Part of the problem is that the figures are apparently percentage of value, which might give misleading figures if a count

I was trying to figure that out too. Part of the problem is that the figures are apparently percentage of value, which might give misleading figures if a country produces a lot of its high-value requirements: producing all your own asparagus isn't much use in a famine if you still rely on 90% imported wheat.