Yes, I think upgrade times will average around 3-4 years on the RJ and 1.5-2 years on the EMB. The huge growth spurt is over and now it’s all about attrition but we have one of the lowest attrition rates in the industry (currently less than 10 per month and I haven’t moved up at all in the last 3 weeks) upgrades will stay well beyond the 2 year mark (RJ) they were at last year.