Is there a good source for historical data on this? The best I could find goes back to 1996, and while the amounts issued in 2006-2010 are high, they don't show

Is there a good source for historical data on this? The best I could find goes back to 1996, and while the amounts issued in 2006-2010 are high, they don't show the steep hockey-stick climb that we saw in the mortgage crisis, for instance. http://webcache.googleusercontent.com/search?q=cache:ksi3L1yHTK8J:www.sifma.org/uploadedfiles/research/statistics/statisticsfiles/corporate-us-corporate-issuance-sifma.xls+US+corporate+debt&cd=11&hl=en&ct=clnk&gl=us&client=firefox-a http://webcache.googleusercontent.com/search?q=cache:ksi3L1y...