A nice graph showing the trend in traffic from 1991 to 2008:

It's nice to see that intercontinental traffic has never been as high as in 2008. However, European traffic still hads to reach the levels achieved in Sabena times.
New airlines/destinations in 2009: AMM (Royal Jordanian), AOE (Turkish Airlines), ATH (Aegean), BVC (Jetairfly), FRL (Wind Jet), MXP (Lufthansa Italia), PMO (Brussels Airlines), SAW (Pegasus), SVQ (Brussels Airlines), TXL (Brussels Airlines), VNO (Brussels Airlines)
Lost airlines/destinations in 2009: ARN (Sterling), BGY (Brussels Airlines), BRN (British Airways operated by Sun-Air of Denmark), CAG (Cagliari), CPH (Sterling), EXT (Flybe), FCO (Air One), LJU (Brussels Airlines), MXP (Air One), NDR (Jetairfly), OSL (Sterling), OUD (Jetairfly), THF (Brussels Airlines), VNO (flyLAL), WRO (LOT)