In terms of weight, more than 90% of the world’s transnational trade and transport relies on maritime transport, with the rest being mostly transnational land transport, and air transport accounting for only 0.21%. However, the high unit price and efficiency of air transport accounts for 26% of global trade. In 2021, Taiwan air transport in terms of weight accounted for only 0.23% its imports and exports, but because of the contribution of high-tech, semiconductor products, Taiwan saw 47% of the total value its imports and exports came through air tansport in 2021.