According to American Business Media BIN (revised March 21, 2012 data on btobonline.com)
Growth 2011 vs. 2010
22,0 % Digital to 6,4 Mrd. USD
6,5 % Data Services to 1,9 Mrd. USD
2,9 % Print to 9,7 Mrd. USD
2,3 % Trade shows to 10,5 Mrd USD
Share of Revenue streams

Source: abm
Print advertising sales 2011 by sector (PDF)
- (not yet revised figures)