We used to print up to only 5% but that causes other problem. In fact if you look at the numbers whether printing happens or not doesn't really mater much to where the debt ratio ends up. The amount printed ends up being pretty tiny compared the the effect of STEEM price changes. (Printing for an entire year only generates about 2% of STEEM market cap worth of SBD!) With printing for an extra month during a downturn you might end up at 12% but without printing 11.8% or something. Just not a big difference, and not worth the other negative effects of a print halt IMO.