The WSJ has several fascinating charts showing the trends:
***** *** **** **** ****** **** that.*** **** ******** **** ** **** the *** ******.
*** *** ********* ****:
*****’* **** ** ***** ** *.*. imports ***’* *** ****** ** * dramatic ****** ** ******* **** *** one ******* ** *******. *******, ****-****** supply ***** ****** ****** ****** ** industries *** ******* *** ******* *** trend.
** *** ****** * ******* ******* in *** ***** ************ ******.