Hotel investment firm Jones Lang LaSalle Hotels released its five-year RevPAR forecast on Friday, in which the company predicts that revenue per available room will begin to grow again in 2011. The 17.4 percent decline in RevPAR the company projects for this year will likely be the most drastic, according to the report. The firm foresees another decline in 2010, by an additional 2.4 percent. A 7.3 percent increase is projected for 2011. Stalled hotel development will be a key factor in the recovery of RevPAR, the report noted.