Interesting, but collides with a stat I ran across years ago, that pre-Crash mfg exports in the late 1920’s were 30% of GNP, which is why the US got nailed while Empire protective tariffs held Britain’s contraction to about (5%). This from PBS, in a show about the interwar years and runup to the Big Show.
The point was made along the way, perhaps somewhere else (a business show?) that China’s export economy looks rather like ours did in the 1920’s and ‘30’s.
Addendum to my last, that 30% figure might have been the degree of economic contraction in the States during the Depression, although the number seems high in retrospect. Perhaps it was just the contraction in exports.
From the graph I will use the year 1925 as typical for the 1920's. That year imports were ~ $4B and we had a $1B trade surplus. Exports were about $5B that year. The total GDP(GNP) for 1925 was $90.6B. So exports as a percent of GDP(GNP) is 5/90.6 = 5.5%