SEMI data April 2011 http://www.semi.org/en/node/37541 SEMI chart from 2001 http://i105.photobucket.com/albums/m225/maugott/SEMIcharts/SEMIequipment_btb2.gif SEMI chart from 1995 http://i105.photobucket.com/albums/m225/maugott/SEMIcharts/SEMIequipment_btb.gif Ratio of SEMI billings to SIA ww chip sales http://i105.photobucket.com/albums/m225/maugott/SEMIcharts/SEMIbillings_chipsales_ratio.gif i105.photobucket.com/albums/m225/maugott/SEMIcharts/SEMIequipment_btb2.gif i105.photobucket.com/albums/m225/maugott/SEMIcharts/SEMIequipment_btb.gif i105.photobucket.com/albums/m225/maugott/SEMIcharts/SEMIbillings_chipsales_ratio.gif