BBInteresting chart.I'll only make some obvious observations....

BB

Interesting chart.

I'll only make some obvious observations.

rate of change between start of chart and WW1 = x

rate of change between WW1 and end of 30s = x/2

rate of change between start of WW2 and start of Vietnam War = 3x/2

blip during vietnam war

rate of change post vietnam war = 3x/2

It would seem that you could POTENTIALLY tie in significant times in recent history and that chart. Times where industrial activity increased/ decreased or resumed.

But they are just casual observations. Would need serious analysis to prove these casual obs.

Cheers

GC