SEMI data July 2011 http://www.semi.org/en/node/38701 SEMI charts http://www.screencast.com/users/maugott/folders/SEMI%20equipment%20charts SEMI chart from 2001 content.screencast.com/users/maugott/folders/SEMI%20equipment%20charts/media/7fc264ed-a0d5-4070-b2f3-ea7099f59131/SEMIequipment_btb2.gif SEMI chart from 1995 content.screencast.com/users/maugott/folders/SEMI%20equipment%20charts/media/f7674184-240e-4378-984c-77e50d3473c1/SEMIequipment_btb.gif Ratio of SEMI billings to SIA ww chip sales content.screencast.com/users/maugott/folders/SEMI%20equipment%20charts/media/fad0ea8e-f914-4295-8b21-897fef0baf46/SEMIbillings_chip%20sales_ratio.gif